fixes spacing in readme, updates error message

Author: sdiakovskyi-gd

README.md

@@ -93,7 +93,8 @@ import com.mailjet.client.MailjetClient;
 import com.mailjet.client.MailjetRequest;
 import com.mailjet.client.MailjetResponse;
 import com.mailjet.client.ClientOptions;
-import com.mailjet.client.resource.ApiVersion;import com.mailjet.client.resource.Emailv31;
+import com.mailjet.client.resource.ApiVersion;
+import com.mailjet.client.resource.Emailv31;
 import org.json.JSONArray;
 import org.json.JSONObject;
 public class MyClass {

src/main/java/com/mailjet/client/MailjetResponseUtil.java

@@ -19,7 +19,7 @@ public final class MailjetResponseUtil {
 	private static final int UNAUTHORIZED_STATUS = 401;
 
 	private static final String UNEXPECTED_RESPONSE_MESSAGE = "Unexpected response from the server";
-	private static final String UNAUTHORIZED_MESSAGE = "Unauthorized. Please,verify your access key or token for the given account";
+	private static final String UNAUTHORIZED_MESSAGE = "Unauthorized. Please,verify your access key and access secret key or token for the given account";
 	private static final String TOO_MANY_REQUESTS_EXCEPTION = "Too Many Requests";
 	private static final String INTERNAL_SERVER_ERROR_GENERAL_EXCEPTION = "Internal Server Error: ";
 

src/test/java/com/mailjet/client/MailjetClientExceptionTest.java

@@ -136,7 +136,7 @@ public void testUnauthorizedResponse() throws MailjetException {
         when(response.getBodyAsString()).thenReturn(UNAUTHORIZED_MESSAGE);
         // assert
         expectedEx.expect(MailjetUnauthorizedException.class);
-        expectedEx.expectMessage("Unauthorized. Please,verify your access key or token for the given account");
+        expectedEx.expectMessage("Unauthorized. Please,verify your access key and access secret key or token for the given account");
         // act
         client.post(request);
     }