Unable to authenticate JWT in Ruby on Rails with Devise - ruby-on-rails

Question

I'm currently having trouble authenticating my Jason Web Token in Ruby on Rails 5.0.1. I'm using devise and jwt gems to validate the jwt generated for the user during log-in.
SessionController
def create
self.resource = warden.authenticate!(auth_options)
set_flash_message!(:notice, :signed_in)
sign_in(resource_name, resource)
yield resource if block_given?
respond_with resource, location: after_sign_in_path_for(resource)
jwt_create
end
def jwt_create
user = User.find_by(email: params[:user][:email])
if user.valid_password? params[:user][:password]
token = JsonWebToken.encode(sub: user.id)
flash[:notice] = "JWT Key: #{token}"
end
end
I'm currently using this to encode and decode my payload.
class JsonWebToken
def self.encode(payload)
payload['exp'] = 2.hours.from_now.to_i
JWT.encode(payload, Rails.application.secrets.secret_key_base)
end
def self.decode(token)
JWT.decode(token, Rails.application.secrets.secret_key_base)
end
end
And authenticating as a before_action with the following:
protected
def authenticate_request!
unless user_id_in_token?
render json: { errors: ['Not Authenticated'] }, status: :unauthorized
return
end
#current_user = User.find(auth_token[:user_id])
rescue JWT::VerificationError, JWT::DecodeError
render json: { errors: ['Not Authenticated'] }, status: :unauthorized
end
private
def http_token
#http_token ||= if request.headers['Authorization'].present?
request.headers['Authorization'].split(' ').last
end
end
def auth_token
#auth_token ||= JsonWebToken.decode(http_token)
end
def user_id_in_token?
http_token && auth_token && auth_token[:user_id].to_i
end
end
I'm not sure if my logic is flawed or I'm missing a key part to validate JWT. Any help would be greatly appreciated.