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Get Access Token JavaScript in fetch
const parameters = {
'code': params.code,
'grant_type': 'authorization_code',
'redirect_uri': window.location.origin,
...
It looks like you're sending the parameters as JSON, but the /oauth2/token endpoint expects them as application/x-www-form-urlencoded POST parameters, and so your parameters aren't getting read. Update your implementation to send application/x-www-form-urlencoded POST parameters instead.
The request parameters do not match any of the supported authorization flows. Please refer to the API documentation for the correct parameters.
but I don't understand why if I used all the parameters from the documentation. At the same time, if you do it in сURL, everything will work out well
Greg-DB
Dropbox Staff
Dropbox StaffIt looks like you're sending the parameters as JSON, but the /oauth2/token endpoint expects them as application/x-www-form-urlencoded POST parameters, and so your parameters aren't getting read. Update your implementation to send application/x-www-form-urlencoded POST parameters instead.
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