How to add system user and generate Access Tokens

Before you can generate a System User access token, you must create a system user. Most endpoints check if the user identified by the token has access to the queried resource. If the user does not have access to the resource, the request will be rejected with error code 200.

Creating System Users

To create a system user:

Sign into the Meta Business manager.

select your business manager account

Navigate to Users > System users.

Click the Add button and create either an admin or employee system user select admin.

Generating System User Access Tokens
To generate a System User access token after creating a system user:

Select the appropriate system user from the list of system users.

Click the Generate new token button.

Select the app that will use the token.
if you Don’t have app you can creat one

Select permissions whatsapp_business_messaging & whatsapp_business_management.

Click Generate token