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It resolves the session, calls ",[449,619,454],{},", captures timing into ",[449,622,623],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[626,627,274],"h2",{"id":628},"options",[446,630,631,632,639],{},"Inherits all ",[633,634,636,638],"a",{"href":635},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[449,637,454],{}," options",", plus:",[641,642,643,662],"table",{},[644,645,646],"thead",{},[647,648,649,653,656,659],"tr",{},[650,651,652],"th",{},"Option",[650,654,655],{},"Type",[650,657,658],{},"Default",[650,660,661],{},"Description",[663,664,665,686,705,724],"tbody",{},[647,666,667,673,678,683],{},[668,669,670],"td",{},[449,671,672],{},"exclude",[668,674,675],{},[449,676,677],{},"string[]",[668,679,680],{},[449,681,682],{},"['\u002Fapi\u002Fauth\u002F**']",[668,684,685],{},"Route patterns to skip (glob).",[647,687,688,693,697,702],{},[668,689,690],{},[449,691,692],{},"include",[668,694,695],{},[449,696,677],{},[668,698,699],{},[449,700,701],{},"undefined",[668,703,704],{},"If set, only matching routes are resolved.",[647,706,707,712,717,721],{},[668,708,709],{},[449,710,711],{},"onIdentify",[668,713,714],{},[449,715,716],{},"(log, session) => void",[668,718,719],{},[449,720,701],{},[668,722,723],{},"Called after successful identification.",[647,725,726,731,736,740],{},[668,727,728],{},[449,729,730],{},"onAnonymous",[668,732,733],{},[449,734,735],{},"(log) => void",[668,737,738],{},[449,739,701],{},[668,741,742],{},"Called when no session is found.",[626,744,746],{"id":745},"route-filtering","Route Filtering",[446,748,749],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[457,751,753],{"className":459,"code":752,"language":462,"meta":463,"style":463},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[449,754,755,771,780,795,808,822,829],{"__ignoreMap":463},[467,756,757,759,761,763,765,767,769],{"class":469,"line":470},[467,758,512],{"class":511},[467,760,515],{"class":481},[467,762,518],{"class":477},[467,764,482],{"class":521},[467,766,524],{"class":481},[467,768,527],{"class":477},[467,770,530],{"class":477},[467,772,773,775,777],{"class":469,"line":501},[467,774,537],{"class":536},[467,776,540],{"class":477},[467,778,779],{"class":481}," [\n",[467,781,782,785,787,789,791],{"class":469,"line":508},[467,783,784],{"class":477},"    '",[467,786,549],{"class":494},[467,788,546],{"class":477},[467,790,527],{"class":477},[467,792,794],{"class":793},"sHwdD","     \u002F\u002F Better Auth itself\n",[467,796,797,799,801,803,805],{"class":469,"line":533},[467,798,784],{"class":477},[467,800,558],{"class":494},[467,802,546],{"class":477},[467,804,527],{"class":477},[467,806,807],{"class":793},"   \u002F\u002F Public endpoints\n",[467,809,810,812,815,817,819],{"class":469,"line":569},[467,811,784],{"class":477},[467,813,814],{"class":494},"\u002Fapi\u002Fhealth",[467,816,546],{"class":477},[467,818,527],{"class":477},[467,820,821],{"class":793},"      \u002F\u002F Health checks\n",[467,823,824,827],{"class":469,"line":590},[467,825,826],{"class":481},"  ]",[467,828,566],{"class":477},[467,830,831,833],{"class":469,"line":604},[467,832,607],{"class":477},[467,834,610],{"class":481},[446,836,837],{},"For high-traffic apps, flip the model — only resolve sessions on routes that need them:",[457,839,841],{"className":459,"code":840,"language":462,"meta":463,"style":463},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[449,842,843,859,887],{"__ignoreMap":463},[467,844,845,847,849,851,853,855,857],{"class":469,"line":470},[467,846,512],{"class":511},[467,848,515],{"class":481},[467,850,518],{"class":477},[467,852,482],{"class":521},[467,854,524],{"class":481},[467,856,527],{"class":477},[467,858,530],{"class":477},[467,860,861,863,865,867,869,872,874,876,878,881,883,885],{"class":469,"line":501},[467,862,572],{"class":536},[467,864,540],{"class":477},[467,866,543],{"class":481},[467,868,546],{"class":477},[467,870,871],{"class":494},"\u002Fapi\u002Fdashboard\u002F**",[467,873,546],{"class":477},[467,875,527],{"class":477},[467,877,491],{"class":477},[467,879,880],{"class":494},"\u002Fapi\u002Faccount\u002F**",[467,882,546],{"class":477},[467,884,563],{"class":481},[467,886,566],{"class":477},[467,888,889,891],{"class":469,"line":508},[467,890,607],{"class":477},[467,892,610],{"class":481},[446,894,895,897,898,900,901,904,905,908,909,911,912,914],{},[449,896,692],{}," and ",[449,899,672],{}," use glob patterns (",[449,902,903],{},"*",", ",[449,906,907],{},"**","). Provide both if you need granular control — ",[449,910,672],{}," wins over ",[449,913,692],{},".",[626,916,918],{"id":917},"lifecycle-hooks","Lifecycle Hooks",[446,920,921,922,924],{},"Use ",[449,923,711],{}," to react to user identification — for example, force-keep logs for premium users via tail sampling:",[457,926,928],{"className":459,"code":927,"filename":461,"language":462,"meta":463,"style":463},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[449,929,930,946,973,1009,1036,1041,1046,1063,1088,1093],{"__ignoreMap":463},[467,931,932,934,936,938,940,942,944],{"class":469,"line":470},[467,933,512],{"class":511},[467,935,515],{"class":481},[467,937,518],{"class":477},[467,939,482],{"class":521},[467,941,524],{"class":481},[467,943,527],{"class":477},[467,945,530],{"class":477},[467,947,948,951,953,956,960,962,965,968,971],{"class":469,"line":501},[467,949,950],{"class":521},"  onIdentify",[467,952,540],{"class":477},[467,954,955],{"class":477}," (",[467,957,959],{"class":958},"sHdIc","log",[467,961,527],{"class":477},[467,963,964],{"class":958}," session",[467,966,967],{"class":477},")",[467,969,970],{"class":511}," =>",[467,972,530],{"class":477},[467,974,975,978,980,983,985,988,990,993,996,998,1001,1003,1006],{"class":469,"line":508},[467,976,977],{"class":473},"    if",[467,979,955],{"class":536},[467,981,982],{"class":481},"session",[467,984,914],{"class":477},[467,986,987],{"class":481},"user",[467,989,914],{"class":477},[467,991,992],{"class":481},"plan",[467,994,995],{"class":477}," ===",[467,997,491],{"class":477},[467,999,1000],{"class":494},"enterprise",[467,1002,546],{"class":477},[467,1004,1005],{"class":536},") ",[467,1007,1008],{"class":477},"{\n",[467,1010,1011,1014,1016,1019,1022,1025,1028,1030,1032,1034],{"class":469,"line":533},[467,1012,1013],{"class":481},"      log",[467,1015,914],{"class":477},[467,1017,1018],{"class":521},"set",[467,1020,1021],{"class":536},"(",[467,1023,1024],{"class":477},"{",[467,1026,1027],{"class":536}," _forceKeep",[467,1029,540],{"class":477},[467,1031,599],{"class":598},[467,1033,485],{"class":477},[467,1035,610],{"class":536},[467,1037,1038],{"class":469,"line":569},[467,1039,1040],{"class":477},"    }\n",[467,1042,1043],{"class":469,"line":590},[467,1044,1045],{"class":477},"  },\n",[467,1047,1048,1051,1053,1055,1057,1059,1061],{"class":469,"line":604},[467,1049,1050],{"class":521},"  onAnonymous",[467,1052,540],{"class":477},[467,1054,955],{"class":477},[467,1056,959],{"class":958},[467,1058,967],{"class":477},[467,1060,970],{"class":511},[467,1062,530],{"class":477},[467,1064,1066,1069,1071,1073,1075,1077,1080,1082,1084,1086],{"class":469,"line":1065},8,[467,1067,1068],{"class":481},"    log",[467,1070,914],{"class":477},[467,1072,1018],{"class":521},[467,1074,1021],{"class":536},[467,1076,1024],{"class":477},[467,1078,1079],{"class":536}," anonymous",[467,1081,540],{"class":477},[467,1083,599],{"class":598},[467,1085,485],{"class":477},[467,1087,610],{"class":536},[467,1089,1091],{"class":469,"line":1090},9,[467,1092,1045],{"class":477},[467,1094,1096,1098],{"class":469,"line":1095},10,[467,1097,607],{"class":477},[467,1099,610],{"class":481},[446,1101,1102,1103,1105,1106,1108,1109,1111],{},"Hooks fire after the session is resolved and ",[449,1104,454],{}," has set its fields. They run on every request that passes the ",[449,1107,692],{},"\u002F",[449,1110,672],{}," filter, so keep them fast and side-effect-free.",[1113,1114,1115,1120],"tip",{},[446,1116,1117,1118,540],{},"Common patterns for ",[449,1119,711],{},[1121,1122,1123,1127,1130],"ul",{},[1124,1125,1126],"li",{},"Force-keep audit logs for admins or high-value plans.",[1124,1128,1129],{},"Tag the request with feature flags or tenant info loaded from the session.",[1124,1131,1132],{},"Increment a per-user counter for billing.",[626,1134,1136],{"id":1135},"error-handling","Error Handling",[446,1138,1139,1140,1143,1144,897,1146,1149],{},"The middleware catches every error from ",[449,1141,1142],{},"getSession"," and logs nothing — your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[449,1145,623],{},[449,1147,1148],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1151,1152,1153],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":463,"searchDepth":501,"depth":501,"links":1155},[1156,1157,1158,1159],{"id":628,"depth":501,"text":274},{"id":745,"depth":501,"text":746},{"id":917,"depth":501,"text":918},{"id":1135,"depth":501,"text":1136},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1163,1166],{"label":298,"icon":301,"to":299,"color":1164,"variant":1165},"neutral","subtle",{"label":312,"icon":315,"to":313,"color":1164,"variant":1165},{},{"title":303,"icon":306},{"title":441,"description":1160},"Ft-jGRp0Xs3NjYmYAXhrK-z4jsNG1S1GJbOMZWpMh0E",[1172,1174],{"title":298,"path":299,"stem":300,"description":1173,"icon":301,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":308,"path":309,"stem":310,"description":1175,"icon":258,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1779694502929]