Three JS loop through materials

I want to search for the material called COIN and assign a new texture to it. I know it’s material number 0, but what I want is to search through the materials and if it finds a name match, assign the texture.

object.traverse( function( node ) {
  if (node.isMesh) {
    if ( node.material[0].name == 'COIN' ) {
      node.material = textura
    } 
  }
})
// Works perfect

Looking something like:

if ( node.material[].name == 'COIN' )
// Error

How can I loop through the object’s textures to find the one I’m interested in without knowing the material index?

Just in case it matters, the object format is FBX.

Thanks!!!