feat: surface invalid request error message in Display (#35)

add 400 error string to fmt::Display for Error

Author: bertrmz

src/error.rs

@@ -127,7 +127,9 @@ impl From<crate::openapi::models::model_401_error::Model401Error> for Error {
 impl From<crate::openapi::models::model_400_error::Model400Error> for Error {
     fn from(e: crate::openapi::models::model_400_error::Model400Error) -> Self {
         match e.code {
-            crate::openapi::models::model_400_error::Code::InvalidRequest => Error::InvalidRequest,
+            crate::openapi::models::model_400_error::Code::InvalidRequest => {
+                Error::InvalidRequest(e.error)
+            }
             _ => Error::Other(e.error),
         }
     }

src/lib.rs

@@ -22,7 +22,7 @@ pub enum Error {
     Reqwest(reqwest::Error),
     Serde(serde_json::Error),
     Io(std::io::Error),
-    InvalidRequest,
+    InvalidRequest(String),
     InvalidAccessToken,
     InvalidNonce,
     OperationNotAllowed,
@@ -40,7 +40,7 @@ impl fmt::Display for Error {
             Error::Reqwest(e) => ("reqwest", e.to_string()),
             Error::Serde(e) => ("serde", e.to_string()),
             Error::Io(e) => ("IO", e.to_string()),
-            Error::InvalidRequest => ("response", "invalid request".to_string()),
+            Error::InvalidRequest(error) => ("response", format!("invalid request: {}", error)),
             Error::InvalidAccessToken => ("response", "invalid access token".to_string()),
             Error::InvalidNonce => ("response", "invalid nonce".to_string()),
             Error::OperationNotAllowed => ("response", "operation not allowed".to_string()),