inputCredentialStr: generateCredentialStr(
				"Z7IXGOO6BZ0REAN1Q26I",
				UTCNow().Format(yyyymmdd),
				"us-west-1",
				"ABCD",
				"ABCD"),
			expectedCredentials: credentialHeader{},
			expectedErrCode:     ErrInvalidServiceS3,
		},
		// Test Case - 7.
		// Test case with invalid region.
		{
			inputCredentialStr: generateCredentialStr(
				"Z7IXGOO6BZ0REAN1Q26I",
				UTCNow().Format(yyyymmdd),