AI-generated Key Takeaways
- 
          AuthenticationError represents an exception that occurs during authentication. 
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          It inherits from ApiError and includes fields such as fieldPath, fieldPathElements, trigger, and errorString. 
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          AuthenticationError has its own field called reason, which is an enumeration detailing various causes for authentication failure like invalid email, invalid OAuth signature, or missing authentication headers.
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          Possible reasons for AuthenticationError include ambiguous or missing authentication information, invalid login or OAuth tokens, issues with network access, or server connection problems. 
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          The reasonfield's possible values are defined in the AuthenticationError.Reason enumeration, covering scenarios from invalid credentials to network and server-side issues.
An error for an exception that occurred when authenticating.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202505
| Field | |
|---|---|
| ApiError(inherited) | |
| 
                            | 
                            The OGNL field path to identify cause of error. | 
| 
                            | A parsed copy of the field path. For example, the field path "operations[1].operand" corresponds to this list: {FieldPathElement(field = "operations", index = 1), FieldPathElement(field = "operand", index = null)}. | 
| 
                            | 
                            The data that caused the error. | 
| 
                            | 
                            A simple string representation of the error and reason. | 
| AuthenticationError | |
| 
                            | 
 Enumerations 
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