Creating authentication message templates

Follow these steps to create an authentication message template:

Navigate to the “new template message” page and choose the authentication category. Refer to this section "Creating Message Template" .

Auto-fill: Considered the easiest way for customers. The code is sent to your app when the customer taps the button. If sending an auto-fill message is impossible even though you have selected it, a copy code message will be sent to your customer instead.

i. If you choose autofill, then you should enter both:

Package Name: The package name must meet the following validation criteria: It must have at least two segments, separated by dots. Each segment should begin with a letter, and all characters in a segment must be alphanumeric or underscores.
Signature Hash: The signature hash parameter for an OTP button must meet the following validation criteria: It must be exactly 11 characters long and can contain alphanumeric characters and the symbols “/”, “+”, “=”.

ii. you can add additional content from these options:

Add security recommendations, when you add this, the message body will be: "123456 is your verification code. For your security, do not share this code".
Add the expiry time for the code. Check this box to set an expiry time for the verification code. You can choose a duration between 1 and 90 minutes. The message sent to customers will say: "123456 is your verification code. This code expires in [X] minutes.".
You can edit the text on both the copy code and autofill buttons.

Copy Code: Content for authentication message templates that include copy code buttons can't be edited. You can add additional content from these options:
- Add security recommendations.
- Add the expiry time for the code.
- Edit the copy code button text.

Once all fields are filled correctly, click on the “submit” button. This action will:
a. Send the template to Meta for verification.
b. Add the template to the templates list with an "In review" status.