Missing parameter 'accessToken' when invoking token()

[kenanEkici]

I'm using token() with "password" as grant_type and am providing client, secret, username and password. The GetUser() of my model is able to retrieve and return the user. However, as a response I get "missing parameter 'accessToken'. It doesn't make sense to my why I should be providing accessToken when I'm clearly requesting for one?

[eternal-scholar]

I had the same issue.
In my case the real error was printed in the terminal where the api was running and not in the output error in postman.
"SequelizeValidationError: string violation: accessTokenExpiresAt cannot be an array or an object"
it was caused by the fact that I had set accessTokenExpiresAt to string instead of date

[jhunexjun]

Is this fixed already? We have the same issues and actually encountered different issues but this is just one.
To all the issues I encountered, I dealt it by making sure that all methods return should match the object structure the OAuth2.0 server is expecting in the model. Like:

function getRefreshToken(bearerToken) {
// more codes here
   return {
           refreshToken: result[0].refresh_token,
           refreshTokenExpiresAt: result[0].expires_at,
           // scope: result[0].scope,  // optional.
           client: { id: result[0].client_id }, // with 'id' property
           user: { id: result[0].user_id },
         };

You can add more as the docs says but the minimum should be met.