Help with getting users from firestore & Ionic4

Hi
Im my register page i have a Register Form, and my .ts it’s like:

Register.ts

register(user:User){
this.auth.auth.createUserWithEmailAndPassword(user.email,user.password).then(()=>{
this.auth.authState.subscribe(auth =>{
this.db.collection(Empresas/${auth.uid}).add({
‘empresa’: user.empresa,
‘email’: user.email,
‘telefono’:user.telefono,
‘razon’:user.razon,
‘cuit’:user.cuit,
‘ciudad’:user.ciudad,
‘direccion’:user.direccion,
‘rubro’:user.rubro,
‘trabajadores’:user.trabajadores,
‘descripcion’:user.description
}).then(()=>{
this.storage.set(‘user’, user.empresa);
this.storage.set(‘loged’,true)
this.router.navigateByUrl(‘tabs’)
})
})
})
}

I want to get the user data stored in firestore to display it in my Profile Page
I thought filtering by mail in the firestore collection.
Can anyone help me with this?