Error attempting to retrieve oath token

[Seanno82]

First time setup. Trying to test by running the following, but it returns: "error":"invalid_client","error_description":"Client Authentication failed"

curl -v POST https://api.sandbox.paypal.com/v1/oauth2/token \
-H "Accept: application/json" \
-H "Accept-Language: en_US" \
-u "Authorization:Basic:<ClientID>:<Secret>" \
-d "grant_type=client_credentials"

Any insights would be greatly appreciated.

[Seanno82]

Meant "OAuth"

[MTS_Stefan · Accepted solution]

Hello Sean,

The error means, that you are sending either the client ID or secret wrong.
Often that is caused by sending live credentials against the sandbox and vs as well as copy and paste issues.
When you are in the developer.paypal.com > my REST Apps, please look up on the sandbox side and do not copy spaces.
Regards,
Stefan