ios - Firebase authentication tokens, check if valid -

is possible check if authentication token invalid?

firautherrorcode.errorcodeinvalidusertoken

this shown possible error can't figure out how access error besides when logging in or resetting password below.

firauth.auth()?.sendpasswordreset(withemail: email, completion: { (error) in if let err =  error as? nserror {     if let errorcode = firautherrorcode(rawvalue: err.code){         if errorcode == firautherrorcode.errorcodeinvalidusertoken{             self.alertfunc(title: "error", message: "invalid token")         }     } } else{     self.alertfunc(title: "success", message: "password reset email has been sent") } 

if user has few devices logged same account, , reset password on one, others not able post firebase due invalid token. need apps on other devices able recognize invalid token , prompt user username , password.

any or links appreciated, thanks!

firauth.auth()?.currentuser?.gettokenwithcompletion({ (string, err) in     if err != nil{         if let err = err nserror?{             if let error = firautherrorcode(rawvalue: err.code){                 switch error{                 case .errorcodeinvalidcredential: self.delegate.invalidtoken()                 case .errorcodeinvalidusertoken: self.delegate.invalidtoken()                 case .errorcodeusertokenexpired: self.delegate.invalidtoken()                 case .errorcodeinvalidcustomtoken: self.delegate.invalidtoken()                 case .errorcodecustomtokenmismatch: self.delegate.invalidtoken()                 default: print("call default error")                 }             }         }     } })