phone reset password Issue

I tried the solution by just creating one account only with mobile number but when I am trying to login, it is not authenticating, as signing in requires temp mail and in order to do so I have to create pseudo email which in turns causes the account creation 2 times . this is again causing reset password issue, where after verification I am not able to reset the password as there is no way to update the password. Resetting the phone password is not working out, For login - temp email is needed For reset password- only phone can get authenticated after sending verification not temp email . Is there any way to authenticate with mobile number number but while resetting the password I can use tempemail and change the password. I exhausted all the options seems have to write my own back end from scratch

Please someone help me here, I need the solution to complete my project