Ensuring that we don't print any credentials

spring-cloud-contract-stub-runner/src/main/java/org/springframework/cloud/contract/stubrunner/StubRunnerOptions.java

@@ -244,10 +244,14 @@ public class StubRunnerOptions {
 				+ this.maxPortValue + ", stubRepositoryRoot='" + this.stubRepositoryRoot + '\''
 				+ ", workOffline=" + this.workOffline + ", stubsClassifier='" + this.stubsClassifier
 				+ '\'' + ", dependencies=" + this.dependencies + ", stubIdsToPortMapping="
-				+ this.stubIdsToPortMapping + ", username='" + this.username + '\'' + ", password='"
-				+ this.password + '\'' + ", stubRunnerProxyOptions='" + this.stubRunnerProxyOptions + "', stubsPerConsumer='"
+				+ this.stubIdsToPortMapping + ", username='" + obfuscate(this.username) + '\'' + ", password='"
+				+ obfuscate(this.password) + '\'' + ", stubRunnerProxyOptions='" + this.stubRunnerProxyOptions + "', stubsPerConsumer='"
 				+ this.stubsPerConsumer
 				+ '\'' + ", stubsPerConsumer='" + this.stubsPerConsumer + '\''
 				+ '}';
 	}
+
+	private String obfuscate(String string) {
+		return StringUtils.hasText(string) ? "****" : "";
+	}
 }

spring-cloud-contract-stub-runner/src/test/groovy/org/springframework/cloud/contract/stubrunner/StubRunnerOptionsBuilderSpec.groovy

@@ -162,6 +162,20 @@ class StubRunnerOptionsBuilderSpec extends Specification {
 			options.mappingsOutputFolder == "folder"
 	}
 
+	def shouldNotPrintUsernameAndPassword() {
+		given:
+			StubRunnerOptionsBuilder builder = builder.withOptions(new StubRunnerOptions(1, 2, "root", true, "classifier",
+					[new StubConfiguration("a:b:c")], [(new StubConfiguration("a:b:c")): 3], "username123", "password123",
+					new StubRunnerOptions.StubRunnerProxyOptions("host", 4), true, "consumer", "folder"))
+			builder.withStubs("foo:bar:baz")
+		when:
+			String options = builder.build().toString()
+		then:
+			!options.contains("username123")
+			!options.contains("password123")
+			options.contains("****")
+	}
+
 	@Issue("#462")
 	@RestoreSystemProperties
 	def shouldSetAllPropsFromSystemProps() {