Custom Plugin SAST failes

buildscript {
repositories {
mavenLocal()
mavenCentral()

	maven {
	url 'https://maven.test.com/artifactory/test-repo'
	 credentials {
    	username =  (project.hasProperty( "mavenUsername" ))?project.mavenUsername:""
	      password = (project.hasProperty( "mavenPassword" ))?project.mavenPassword:""
	 }
}
dependencies {
   classpath "com.test.gradle:test-gradle-plugin:1.1.2"

}

}
}

apply plugin: ‘testgradleplugin’

Here is the snippet of my code. When I push my code to gitlab SAST failed with the following error
Could not get unknown property ‘mavenUsername’ for Credentials [username: null] of type org.gradle.internal.credentials.DefaultPasswordCredentials_Decorated.

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  • Get more help at https://help.gradle.org
    Have any one come across this kind of issue. Any help is appreciated.
    Thanks
    Paddy