Chaining different API calls in a Vue component including one with a for loop

I'm trying to understand how to chain two different API calls including one with a for loop in a 'notes' Vue component. I have a really basic experience of promises and I'm looking to improve.

I'm making a first API call to get all the notes and pushing them into an array using a Vuex mutation. During that first API call I'm also mapping the different users emails into an Object.

Using this mapped object, I'm making a second API call inside a for loop to get all the users avatars.

Here's what the first API call looks like :

getAllNotesAPI(entity) {
  noteService.getNotes(entity)
    .then((response) => {

      if (response.data.length === '0') {
        // Set hasData to false if the response is 0
        this.hasData = false;
      } else {
        // Push data into the note array using a store mutation
        this.setAllNotes(response.data);
      }

      // Mapping all users emails into 'userEmails'
      this.userEmails = [...new Set(response.data.map(x => x.userEmail))];

      // Calling my second API call here to get all the avatars associated with these emails
      for (let i = 0; i < this.userEmails.length; i++) {
        this.getAvatarAPI(this.userEmails[i])
      }
    })
    .catch((error) => {
      console.log(error);
    })
    .finally(() => {
      this.endLoader('notes');
    });
},

this.getAvatarAPI is the second API call which looks like this :

getAvatarAPI(login) {
  userService.getAvatar(login)
    .then((response) => {

      let newAvatar = {
        userEmail: login,
        picture: response.data.picture
      };
      // Push the response into a userAvatar Object using a store mutation
      this.setUserAvatar(newAvatar);
    }).catch((error) => {
      console.log(error)
  })
},

I've tried using async / await but couldn't figure out how to bind this inside of an async function (this.getAvatarAPI(this.userEmails)) was undefined, I've tried chaining using multiples then but couldn't figure out how to : get all my notes then all my avatars then end the 'note' loader once both those API calls are done.

If any of you could give me some pointers or the beginning of an answer that would be truly appreciated !