```ruby
DeviseTokenAuth.setup do |config|
  # By default the authorization headers will change after each request. The
  # client is responsible for keeping track of the changing tokens. Change
  # this to false to prevent the Authorization header from changing after
  # each request.
  #config.change_headers_on_each_request = true

  # By default, users will need to re-authenticate after 2 weeks. This setting
  # determines how long tokens will remain valid after they are issued.
  #config.token_lifespan = 2.weeks

  # Sometimes it's necessary to make several requests to the API at the same
  # time. In this case, each request in the batch will need to share the same
  # auth token. This setting determines how far apart the requests can be while
  # still using the same auth token.
  #config.batch_request_buffer_throttle = 5.seconds

  # This route will be the prefix for all oauth2 redirect callbacks. For
  # example, using the default '/omniauth', the github oauth2 provider will
  # redirect successful authentications to '/omniauth/github/callback'
  #config.omniauth_prefix = "/omniauth"
end
```

Disable changing the token every time
user
```ruby
DeviseTokenAuth.setup do |config|
  # By default the authorization headers will change after each request. The
  # client is responsible for keeping track of the changing tokens. Change
  # this to false to prevent the Authorization header from changing after
  # each request.
  config.change_headers_on_each_request = false

  # By default, users will need to re-authenticate after 2 weeks. This setting
  # determines how long tokens will remain valid after they are issued.
  #config.token_lifespan = 2.weeks

  # Sometimes it's necessary to make several requests to the API at the same
  # time. In this case, each request in the batch will need to share the same
  # auth token. This setting determines how far apart the requests can be while
  # still using the same auth token.
  #config.batch_request_buffer_throttle = 5.seconds

  # This route will be the prefix for all oauth2 redirect callbacks. For
  # example, using the default '/omniauth', the github oauth2 provider will
  # redirect successful authentications to '/omniauth/github/callback'
  #config.omniauth_prefix = "/omniauth"
end
```
assistant