Skip openrs2 repositories if no username/password are supplied

build.gradle.kts

@@ -21,6 +21,7 @@ allprojects {
     repositories {
         mavenLocal()
         mavenCentral()
+        if (hasProperty("repoUsername")) {
             maven(url = "https://repo.openrs2.dev/repository/openrs2") {
                 credentials {
                     username = findProperty("repoUsername")?.toString()
@@ -33,6 +34,7 @@ allprojects {
                     password = findProperty("repoPassword")?.toString()
                 }
             }
+        }
         maven(url = "https://dl.bintray.com/michaelbull/maven")
     }