* 验证IM用户签名 * 0. 成功 * 1. 票据格式不合法 * 2. 参数信息不一致 * 3. 票据过期 * 4. 签名验证失败
(sdkAppID, accountType, userID, userSig)
source not stored for this graph (policy: none)
nothing calls this directly
no test coverage detected