This function is used for sending SMS verification code to users when they sign up, allowing them to validate their mobile numbers.
* message: the message content. It must include "[%sms_checkcode%]" which will be replaced by the verification code. It can include "[%first_name%]" and "[%last_name%]" which will be replaced by the user's firstname and lastname respectively. Must be URL encoded.
* login_name: the account used for signing up a user.* login_passwd: the password of the account used for signing up a user.
The response contains the following attribute:
* msg: Success or error message.
The following example shows a successful HTTP GET request and response.