The API must be implemented through a local JAR file at the moment. There is no external repository. Here are two ways of doing so:
dependencies {
compileOnly files('path/to/file.jar')
}
<dependencies>
<dependency>
<groupId>io.github.battlepass</groupId>
<artifactId>BattlePass</artifactId>
<version>LATEST</version>
<scope>system</scope>
<systemPath>${project.basedir}/path/to/file.jar</systemPath>
</dependency>
</dependencies>