profile.js

const response = await client.users.profile.get({user: 'USER_ID_GOES_HERE'});
console.log(response);
console.log(response.profile.pronouns);
console.log(response.profile.fields); // These are where custom fields like Department or Location would be

response.json

{
  "ok":true,
  "profile":{
    "title":"",
    "phone":"",
    "skype":"",
    "real_name":"Colm Doyle",
    "real_name_normalized":"Colm Doyle",
    "display_name":"colmdoyle",
    "display_name_normalized":"colmdoyle",
    "fields":{
      "XfJFMSKEUW":{
        "value":"https://cdoyle.me",
        "alt":""
      },
      "XfRB5VATC7":{
        "value":"Developer Relations",
        "alt":""
      }
    },
    "status_text":"",
    "status_emoji":"",
    "status_expiration":0,
    "avatar_hash":"28e4bc399c9a",
    "image_original":"https://avatars.slack-edge.com/2019-09-24/771293549024_28e4bc399c9a68f9a21c_original.png",
    "is_custom_image":true,
    "email":"cdoyle@acme-corp.com",
    "pronouns":"he/him",
    "first_name":"Colm",
    "last_name":"Doyle",
    "image_24":"https://avatars.slack-edge.com/2019-09-24/771293549024_28e4bc399c9a68f9a21c_24.png",
    "image_32":"https://avatars.slack-edge.com/2019-09-24/771293549024_28e4bc399c9a68f9a21c_32.png",
    "image_48":"https://avatars.slack-edge.com/2019-09-24/771293549024_28e4bc399c9a68f9a21c_48.png",
    "image_72":"https://avatars.slack-edge.com/2019-09-24/771293549024_28e4bc399c9a68f9a21c_72.png",
    "image_192":"https://avatars.slack-edge.com/2019-09-24/771293549024_28e4bc399c9a68f9a21c_192.png",
    "image_512":"https://avatars.slack-edge.com/2019-09-24/771293549024_28e4bc399c9a68f9a21c_512.png",
    "image_1024":"https://avatars.slack-edge.com/2019-09-24/771293549024_28e4bc399c9a68f9a21c_1024.png",
    "status_text_canonical":""
  },
  "response_metadata":{
    "scopes":[
      "users.profile:read",
      "commands"
    ],
    "acceptedScopes":[
      "users.profile:read"
    ]
  }
}