@.ƒaℓsє.
Once you create a Developer Application, you are assigned a client id. Some authentication flows also require a client secret. You can generate one on the same page as the client ID. Client IDs are public and can be shared (e.g. embedded in the source of a web page), but client secrets are equivalent to a password for your application and must be kept confidential.
There are two different keys.
Since its javascript, i can't hide it like: