Firebase unlink email/password auth from user on iOS -

i'm trying unlink email/password authentication user in swift on ios. i've read the documentation , managed link , unlink facebook authentication without problem. however, after linking email/password credentials successfully, providerdata object nil. providerid "firebase" when pass unlink code following error thrown:

error domain=firautherrordomain code=17016 "user not linked account given provider." userinfo={nslocalizeddescription=user not linked account given provider., error_name=error_no_such_provider} 

the unlink code i'm using is:

let providerid = (firauth.auth()?.currentuser?.providerid)! print("trying unlink:",providerid)     // providerid = "firebase" firauth.auth()?.currentuser?.unlinkfromprovider(providerid) { user, error in     if let error = error {         print("unlink error:", error)     } else {         // provider unlinked account        print("unlinked...user.uid:", user!.uid, "anonymous?:", user!.anonymous)         }     } 

reading docs , having got working facebook, expected providerdata array populated after email authentication. linking code wrong (it doesn't throw error , appears work fine)?

my linking code:

let credential = firemailpasswordauthprovider.credentialwithemail(email, password: password)  firauth.auth()?.currentuser!.linkwithcredential(credential) { (user, error) in     if user != nil && error == nil {         // success         self.success?(user: user!)         dispatch_async(dispatch_get_main_queue(), {             self.dismissviewcontrolleranimated(true, completion: nil)             if type == "new" {                 print("new user logged in...")             }             if type == "existing" {                 print("existing user logged in...")             }         })     } else {         print("login error:",error)         self.showokalertwithtitle("login error", message: error!.localizeddescription)     } } 

any pointers of how can modify approach great.

to profile information retrieved sign-in providers linked user, use providerdata property.

if let user = firauth.auth()?.currentuser {   profile in user.providerdata {     // id of provider (ex: facebook.com)     let providerid = profile.providerid   } } else {   // no user signed in. } 

calling firauth.auth()?.currentuser?.providerid result "firebase".