chore: Use existing github user/auth functions

https://github.com/Jman-Github/Universal-ReVanced-Manager/blob/597b3173a004f5a9aae54326046dd7fd4c5b7777/settings.gradle.kts#L51-L55

Author: LisoUseInAIKyrios

settings.gradle.kts

@@ -41,13 +41,11 @@ dependencyResolutionManagement {
             // A repository must be specified for some reason. "registry" is a dummy.
             url = uri("https://maven.pkg.github.com/MorpheApp/registry")
             credentials {
-                val hardcodedUser = ""
-                val hardcodedToken = ""
-                val gprUser: String? = providers.gradleProperty("gpr.user").orNull
-                val gprKey: String? = providers.gradleProperty("gpr.key").orNull
+                val gprUser: String? = githubUser()
+                val gprKey: String? = githubToken()
 
-                username = (hardcodedUser.ifBlank { System.getenv("GITHUB_ACTOR") ?: gprUser })
-                password = (hardcodedToken.ifBlank { System.getenv("GITHUB_TOKEN") ?: gprKey })
+                username = gprUser.orEmpty().ifBlank { "anonymous" }
+                password = gprKey.orEmpty()
             }
         }
     }