Could not obtain Google oAuth 2 token on POSTMan
<p>Well, since the <a href="https://stackoverflow.com/questions/36147889/keep-getting-403-forbidden-from-google-api-using-php-client-library-v1">Other problem</a>(solved) remain unsolved, I was thinking to use POSTMan to do Trial and Error on each steps that the Client library will do.</p>

<p>So I read the <a href="https://developers.google.com/identity/protocols/OAuth2#basicsteps" rel="nofollow noreferrer">Basic steps</a> of Google OAuth2 again, created another OAuth 2 ID at <strong>Api Manager > Credentials</strong> in Dev Console and ID type is Web Application, and filled them into the POSTMan:</p>

<ol>
<li>New tab in POSTMan, then click the Authorization label.</li>
<li>Choose type as OAuth 2.0 and select "Add token to the url"</li>
<li>Auth URL: <a href="https://accounts.google.com/o/oauth2/v2/auth" rel="nofollow noreferrer">https://accounts.google.com/o/oauth2/v2/auth</a></li>
<li>Access Token URL: <a href="https://www.googleapis.com/oauth2/v4/token" rel="nofollow noreferrer">https://www.googleapis.com/oauth2/v4/token</a></li>
<li>Client ID: [the Client ID that I just received]</li>
<li>Client Secret: [the Client secret that I just received]</li>
<li>Scope: [empty]</li>
<li>Grant Type: Authorization Code</li>
<li>Request access token locally: Selected</li>
<li>Click "Request Token"</li>
<li>POSTMan replied me: "Could not complete OAuth2.0 login"</li>
</ol>

<p>Do I missed something?</p>

<p>(Google redirect URI could be found <a href="https://developers.google.com/identity/protocols/OAuth2InstalledApp#choosingredirecturi" rel="nofollow noreferrer">here</a>)</p>

<p>(API scope could be found <a href="https://developers.google.com/identity/protocols/googlescopes#clouduseraccountsvm_alpha" rel="nofollow noreferrer">here</a>)</p>