feature: php function to generate jwt

[rezarss]

Is your feature request related to a problem?

i have my custom login endpoint which logs in users using mobile number and otp (rest_route=/rad/v1/otp-login).

i want simple-jwt-login plugin a function to generate jwt.
then i control user login in my custom endpoint and return this jwt if user logged in with mobile and otp successfully.

(mobile number is stored in usermeta. like digits plugin. i mean that no email or password is required to login.)

i also provide bellow ways to login:

– login with mobile number and otp.
– login with username and password.
– login with email and password.

Describe the solution you'd like

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