<dependency>
  <groupId>org.apache.archiva.redback</groupId>
  <artifactId>redback-users-providers</artifactId>
  <version>2.1</version>
  <type>pom</type>
</dependency>

'org.apache.archiva.redback:redback-users-providers:pom:2.1'

<dependency org="org.apache.archiva.redback" name="redback-users-providers" rev="2.1">
  <artifact name="redback-users-providers" type="pom" />
</dependency>

@Grapes(
@Grab(group='org.apache.archiva.redback', module='redback-users-providers', version='2.1')
)

compile 'org.apache.archiva.redback:redback-users-providers:2.1'

[org.apache.archiva.redback/redback-users-providers "2.1"]

libraryDependencies += "org.apache.archiva.redback" %% "redback-users-providers" % "2.1"