```ruby
class SessionsController < Devise::SessionsController
  
  def destroy
    #current_user.authentications.where(provider: 'canvas').destroy_all
    super
  end

end```

Update session controller to return jwt token upon login
user
```ruby
class SessionsController < Devise::SessionsController
  # Require our abstraction for encoding/deconding JWT.
  require 'auth_token'

  respond_to :json

  def create

    # This is the default behavior from devise - view the sessions controller source:
    # https://github.com/plataformatec/devise/blob/master/app/controllers/devise/sessions_controller.rb
    self.resource = warden.authenticate!(auth_options)
    set_flash_message(:notice, :signed_in) if is_flashing_format?
    sign_in(resource_name, resource)
    yield resource if block_given?

    # Here we're deviating from the standard behavior by issuing our JWT
    # to any JS based client.
    token = AuthToken.issue_token({ user_id: resource.id })
    respond_with resource, location: after_sign_in_path_for(resource) do |format|
      format.json { render json: {email: resource.email, displayName: resource.name, jwt_token: token} }
    end
  end

  def destroy
    #current_user.authentications.where(provider: 'canvas').destroy_all
    super
  end
end
```
assistant