I use the authentication API to login and retrieve access token successfully, but, when I use the access token to access other API such as get phone number or send SMS, the error "OAU-123: Authorization header is not specified" is returned. Note: we still send SMS and call other API successfully using sandbox account with the same source code. 2 days ago, our system still worked correctly.
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We are aware of this issue and working on a resolution. We will post back here when we have more information. Thanks.
We have tested the system successfully and it should be operational again for you. Please try it out.
It works fine. Thank you.
I am going to mark this as solved for now. Thanks for your patience and happy coding!
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