How to use "Forgot Password" by entering phone number?

Hello all.
I created my Login System and everything is working fine.
I am only using user’s phone number and password to login to my app after signing up.

But what if the user forgets his password, how can I add an element to use the “Forget Password” option through user’s mobile number?

Kindly help.

See tutorials on youtube. There are thousands of tutorials about forget password

You can refer this Template. It also includes forgot password method.