AI-generated Key Takeaways
- 
          The AuthenticationError indicates an exception occurred during the authentication process. 
- 
          This error inherits from ApiError and includes details like field path, trigger, and error string. 
- 
          Specific reasons for an AuthenticationError are provided, such as invalid email, authentication failed, or missing authentication header. 
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          Additional reasons include issues with OAuth signatures, invalid services, network access problems, and internal server errors during connection. 
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          The reasonfield for AuthenticationError uses an enumeration to specify the exact cause of the authentication failure.
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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