Creates a new M2M Client. On initial client creation, you may pass in a custom client_id or client_secret to import an existing M2M client. If you do not pass in a custom client_id or client_secret, one will be generated automatically. The client_id must be unique among all clients in your project.
Important: This is the only time you will be able to view the generated client_secret in the API response. Stytch stores a hash of the client_secret and cannot recover the value if lost. Be sure to persist the client_secret in a secure location. If the client_secret is lost, you will need to trigger a secret rotation flow to receive another one.