declare new authentication related errors

meilisearch-http/src/extractors/authentication/error.rs

@@ -0,0 +1,26 @@
+use meilisearch_error::{Code, ErrorCode};
+
+#[derive(Debug, thiserror::Error)]
+pub enum AuthenticationError {
+    #[error("You must have an authorization token")]
+    MissingAuthorizationHeader,
+    #[error("Invalid API key")]
+    InvalidToken(String),
+    // Triggered on configuration error.
+    #[error("Irretrievable state")]
+    IrretrievableState,
+    #[error("Unknown authentication policy")]
+    UnknownPolicy,
+}
+
+impl ErrorCode for AuthenticationError {
+    fn error_code(&self) -> Code {
+        match self {
+            AuthenticationError::MissingAuthorizationHeader => Code::MissingAuthorizationHeader,
+            AuthenticationError::InvalidToken(_) => Code::InvalidToken,
+            AuthenticationError::IrretrievableState => Code::Internal,
+            AuthenticationError::UnknownPolicy => Code::Internal,
+        }
+    }
+}
+