How to import Java Animated Entity in forge 1.12.2

Hi! I made API in build.gradle, but whan I try to load animated model I get error: "You need Geckolib library"

build.gradle code:

repositories{
        maven { url 'https://dl.cloudsmith.io/public/geckolib3/geckolib/maven/' }
}
dependencies{
        implementation fg.deobf('software.bernie.geckolib:forge-1.12.2-geckolib:3.0.21')
}