How to get the verification code?

There are many ways to obtain the verification code, depending on the application scenarios and requirements.

1, SMS verification code: send the verification code to the user's mobile phone by SMS, and the user will verify it after entering the correct verification code.

2. Email verification code: send the verification code to the user's email, and the user will enter the correct verification code for verification.

3. Graphical verification code: a picture containing random numbers or letters is displayed on the registration or login page, and users need to enter the correct verification code before continuing the operation.