Exchanges the username and secret issued to your organization for a bearer access token. Send the token in
the Authorization: Bearer {accessToken} header of every other request.The token is valid for expiresIn seconds. No refresh token is issued: request a new token with the same
credentials before the current one expires. Every call issues a new token; tokens issued earlier stay valid
until they expire.Usage:
1.
Call this endpoint with your username and secret.
2.
Store the returned accessToken.
3.
Include the token in subsequent requests: Authorization: Bearer {accessToken}.
4.
When the token expires (based on expiresIn), obtain a new one.