AI-generated Key Takeaways
- 
          The page lists various services available, including AdRuleService, AdjustmentService, and many others. 
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          It details inheritance relationships, showing that AuthenticationError is a type of ApiError. 
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          The AuthenticationError includes fields such as fieldPath, trigger, errorString, and a reason code. 
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          The reason field for AuthenticationError has several possible enumerated values indicating the specific authentication failure. 
- Namespace
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               https://www.google.com/apis/ads/publisher/v202505
| Field | |
|---|---|
| ApiError(inherited) | |
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| AuthenticationError | |
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 Enumerations 
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