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Never mind, I used "~" instead.

Ok, i got the Authentication part down. Yipee! 

Now, I'm getting error when i try to send an SMS

{

  ["errorCode"]=>   string(16) "InvalidParameter"   ["message"]=>   string(47) "Resource for parameter [accountId] is not found"   ["errors"]=>   array(1) {     [0]=>     object(stdClass)#3 (3) {       ["errorCode"]=>       string(7) "CMN-102"       ["message"]=>       string(47) "Resource for parameter [accountId] is not found"       ["parameterName"]=>       string(9) "accountId"     }   }   ["parameterName"]=>   string(9) "accountId" } 

i got [accountId] from  [owner_id] here.

Authentication/Token

{   ["access_token"]=>   string(234) "<changed>"   ["token_type"]=>   string(6) "bearer"   ["expires_in"]=>   int(3599)   ["refresh_token"]=>   string(234) "<changed>"   ["refresh_token_expires_in"]=>   int(604799)   ["scope"]=>   string(62) "ReadPresence ReadMessages ReadCallLog SMS RingOut ReadAccounts"   ["owner_id"]=>   string(10) "2602536012"   ["endpoint_id"]=>   string(22) "_2rE1bLdSomqUlj-I4Xn4g" } 

Figured out the issue.

It has something to with a character in my password.
The offending Character was "+"

How would i do that? I'm using Advanced REST client

Could you please provide the complete oauth POST request you're sending (please remove your API keys: app_key and app_secret).

I tried. Still get this error.

{
"error": "invalid_grant"
"error_description": "Invalid resource owner credentials."
}

I ignored what i have in the sandbox and followed this guide.

https://developer.ringcentral.com/library/tutorials/get-started.html

Awesome! Keep us posted on your progress and let us know if you have any more questions.

Yes, the application has been approved. Will try it again today (with a fresh set of eyes).

And your application has applied for and been approved for production access? If you're not sure, visit the Developer Portal and view the "Credentials" section for your application. The API server, app_key, and app_secret are different for production environment, and you must apply to be granted this access.

Are you making sure the username is prefixed with the country code prefix, so for instance if I am in the USA the country code is "1" and the username would be "14445559999"?

Are you using the extension property? If you are and it doesn't match the username you're providing, then I get an invalid_client sometimes.

Are there any spaces before or after your username, extension, or password?

Is the Content-Type header property set to "application/x-www-form-urlencoded"?

Is the Accept header property set to "application/json"?

I did.. that is one of the things i have to re-encode for the production server.

I just confirmed the base64 hash of the keys just now.

Hi Ted,

Could you use the AppKey and AppSecret issued against your Production Environment.

Find your application key and secret by Navigating to My Account -> Applications -> Application Name. Use Production Application key and secret.

Let us know if you are able to authenticate.