BAD_GRANT_TYPE on cURL

[dougyan12]

I am having trouble getting my access token when trying to authenticate using OAuth 2.0.

After retrieving a code using a callback URI, I am attempting to make a cURL requst as follows:

curl \
-H ‘Content-Type:application/x-www-form-urlencoded’ \
-X POST \
-d ‘{
        "grant_type":"authorization_code”,\
	”client_id":<client_id>,\
	"client_secret":<client_id>,\
	”redirect_uri":<my_url>,\
	“code":<code>}’\ 
https://api.hubapi.com/oauth/v1/token

However, I get the following error:

{
  "status":"BAD_GRANT_TYPE",
  "message":"missing or unknown grant type",
  "correlationId":"5e63d42e-46c5-4b03-8168-8b3cd82794e1",
  "requestId":"b732e441fb093ad8b6d76b9d30a21677"
}

I have tried adding "charset=utf-8" and changing the header type to "application/json" but neither of those solve the issue.

Thank you!

[dougyan12 · Accepted solution]

I figured out the issue. I was writing out my cURL requests into a notepad application, and it was autocorrecting my single quotes from straight quotes ( ' ) into curvy quotes ( ’ ) and this was causing the command to be mis-interpreted.