refactor(logging): remove explicit toString() calls

Author: Jiankai Zheng

src/main/java/spotify/api/authorization/AuthorizationCodeFlow.java

@@ -115,7 +115,7 @@ public AuthorizationCodeFlow build() {
             authorizationCodeFlow.showDialog = this.showDialog;
 
             logger.trace("AuthorizationCodeFlow successfully constructed.");
-            logger.debug(authorizationCodeFlow.toString());
+            logger.debug(String.valueOf(authorizationCodeFlow));
             return authorizationCodeFlow;
         }
     }

src/main/java/spotify/api/authorization/AuthorizationCodeFlowPKCE.java

@@ -138,7 +138,7 @@ public AuthorizationCodeFlowPKCE build() {
             authorizationCodeFlowPKCE.codeChallenge = this.codeChallenge;
 
             logger.trace("AuthorizationCodeFlowPKCE successfully constructed.");
-            logger.debug(authorizationCodeFlowPKCE.toString());
+            logger.debug(String.valueOf(authorizationCodeFlowPKCE));
             return authorizationCodeFlowPKCE;
         }
     }

src/main/java/spotify/utils/LoggingUtil.java

@@ -6,6 +6,6 @@
 public class LoggingUtil {
 
     public static <T> void logHttpCall(final Logger logger, final Call<T> httpCall) {
-        logger.debug("{} / {}", httpCall.request().method(), httpCall.request().url().toString());
+        logger.debug("{} / {}", httpCall.request().method(), httpCall.request().url());
     }
 }