Possible error/typo
"Scopes are specified as a space-separated list in the URL scope parameter, when requesting authorization:
&scope=user:edit+user:read:email"
Space- or Plus-separated?
1
vote

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A good call out. While + and %20 are usually considered interchangeable in the context of URL encoding for spaces, the team has confirmed we should document the use of %20 instead. This will be updated.
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BarryCarlyon commented
a plus is a URL encoded space