Chore: Scope URLs with account_id (#601)

* Chore: Enable Users to create multiple accounts

Addresses: #402
- migrations to split roles and other attributes from users table
- make changes in code to accommodate this change

Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

app/controllers/api/v1/accounts/agents_controller.rb

@@ -0,0 +1,69 @@
+class Api::V1::Accounts::AgentsController < Api::BaseController
+  before_action :fetch_agent, except: [:create, :index]
+  before_action :check_authorization
+  before_action :find_user, only: [:create]
+  before_action :create_user, only: [:create]
+  before_action :save_account_user, only: [:create]
+
+  def index
+    @agents = agents
+  end
+
+  def destroy
+    @agent.account_user.destroy
+    head :ok
+  end
+
+  def update
+    @agent.update!(agent_params.except(:role))
+    @agent.account_user.update!(role: agent_params[:role]) if agent_params[:role]
+    render 'api/v1/models/user.json', locals: { resource: @agent }
+  end
+
+  def create
+    render 'api/v1/models/user.json', locals: { resource: @user }
+  end
+
+  private
+
+  def check_authorization
+    authorize(User)
+  end
+
+  def fetch_agent
+    @agent = agents.find(params[:id])
+  end
+
+  def find_user
+    @user =  User.find_by(email: new_agent_params[:email])
+  end
+
+  def create_user
+    return if @user
+
+    @user = User.create!(new_agent_params.slice(:email, :name, :password, :password_confirmation))
+  end
+
+  def save_account_user
+    AccountUser.create!(
+      account_id: current_account.id,
+      user_id: @user.id,
+      role: new_agent_params[:role],
+      inviter_id: current_user.id
+    )
+  end
+
+  def agent_params
+    params.require(:agent).permit(:email, :name, :role)
+  end
+
+  def new_agent_params
+    time = Time.now.to_i
+    params.require(:agent).permit(:email, :name, :role)
+          .merge!(password: time, password_confirmation: time, inviter: current_user)
+  end
+
+  def agents
+    @agents ||= current_account.users
+  end
+end