Throws OAuthExceptions based on HTTP error response. 
This class consolidates OAuth error processing.
See https://datatracker.ietf.org/doc/html/rfc6749 
Section 5.2
The authorization server responds with an HTTP 400 (Bad Request)
status code (unless specified otherwise)...
   
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| void  | from4xx (http::HTTPResponse &response) const override | 
|   | OAuth-specific handling for HTTP 4xx-errors.  
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| virtual void  | from4xx (int httpStatusCode) const | 
|   | Throws exception, when HTTP-status code is 4xx.  
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virtual void  | from400 () const | 
|   | Throws exception, when HTTP-status code is 400. 
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virtual void  | from401 () const | 
|   | Throws exception, when HTTP-status code is 401. 
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virtual void  | from403 () const | 
|   | Throws exception, when HTTP-status code is 403. 
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virtual void  | from404 () const | 
|   | Throws exception, when HTTP-status code is 404. 
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| virtual void  | from4xxOther (int httpStatusCode) const | 
|   | Throws exception, when HTTP-status code some other 4xx-series.  
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| virtual void  | from5xx (tenduke::http::HTTPResponse &response) const | 
|   | Throws exception for 5xx responses.  
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| virtual void  | from5xx (int httpStatusCode) const | 
|   | Throws exception, when status code is any 5xx-series.  
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