fix(billing): prevent nil pointer dereference in GetUsage#2389
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When `DisplayTokenStatEnabled` is true and `GetTokenById` returns an error (e.g. tokenId is 0), `token` can be nil. Accessing `token.UsedQuota` without checking causes a panic. Add nil and error checks before accessing token fields. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
token.UsedQuotainGetUsage().Bug
In
controller/billing.go, whenDisplayTokenStatEnabledis true, the code callsmodel.GetTokenById(tokenId)and immediately accessestoken.UsedQuotawithout checking iftokenis nil or if an error occurred.GetTokenByIdreturnsnilwhenid == 0(which can happen if theTokenIdcontext key is missing), causing a nil pointer dereference panic.Test plan
/api/billing/usageendpoint works correctly with a valid token🤖 Generated with Claude Code