I have request an access token and saved it in my database so all my apps can use it. It works on that day but on the next day my app start getting 401 error saying my token is not valid. It works again after I make a OAuth request and update the token on my database.
In the documentation it seems access token is permanent, but none of it explicitly state that. Is access token permanent or will it expired? If it expired, what is the duration of the token?
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