Mina Deploy uses wrong user - ruby

Question

I got some issue with the gem 'mina'. If I do set :user, 'username', he tries to connect to the server via Username#xxx.... wich is not working if the user is not existing. My PC is name Username. So mina setup and mina deploy are not working.
Does someone know a solution?.
Thanks
Best regards
Matze
EDIT:
Gemfile:
gem 'mina'
After that I run bundle install and mina init
deploy.rb:
require 'mina/rails'
require 'mina/git'
# require 'mina/rbenv' # for rbenv support. (https://rbenv.org)
require 'mina/rvm' # for rvm support. (https://rvm.io)
# Basic settings:
# domain - The hostname to SSH to.
# deploy_to - Path to deploy into.
# repository - Git repo to clone from. (needed by mina/git)
# branch - Branch name to deploy. (needed by mina/git)
set :user, "user"
set :application_name, 'appname'
set :domain, 'xx.xxx.xxx.xxx'
set :deploy_to, '/var/www/user/appname'
set :repository, 'user#xx.xxx.xxx.xxx:/home/user/git/appname.git'
set :branch, 'master'
# Optional settings:
# set :user, 'user' # Username in the server to SSH to.
# set :port, '30000' # SSH port number.
# set :forward_agent, true # SSH forward_agent.
# Shared dirs and files will be symlinked into the app-folder by the 'deploy:link_shared_paths' step.
# Some plugins already add folders to shared_dirs like `mina/rails` add `public/assets`, `vendor/bundle` and many more
# run `mina -d` to see all folders and files already included in `shared_dirs` and `shared_files`
# set :shared_dirs, fetch(:shared_dirs, []).push('public/assets')
set :shared_files, fetch(:shared_files, []).push('config/database.yml', 'config/secrets.yml')
# This task is the environment that is loaded for all remote run commands, such as
# `mina deploy` or `mina rake`.
task :remote_environment do
# If you're using rbenv, use this to load the rbenv environment.
# Be sure to commit your .ruby-version or .rbenv-version to your repository.
# invoke :'rbenv:load'
# For those using RVM, use this to load an RVM version#gemset.
# invoke :'rvm:use', 'ruby-1.9.3-p125#default'
end
# Put any custom commands you need to run at setup
# All paths in `shared_dirs` and `shared_paths` will be created on their own.
task :setup do
# command %{rbenv install 2.3.0 --skip-existing}
end
desc "Deploys the current version to the server."
task :deploy do
# uncomment this line to make sure you pushed your local branch to the remote origin
# invoke :'git:ensure_pushed'
deploy do
# Put things that will set up an empty directory into a fully set-up
# instance of your project.
invoke :'git:clone'
invoke :'deploy:link_shared_paths'
invoke :'bundle:install'
invoke :'rails:db_migrate'
invoke :'rails:assets_precompile'
invoke :'deploy:cleanup'
on :launch do
in_path(fetch(:current_path)) do
command %{mkdir -p tmp/}
command %{touch tmp/restart.txt}
end
end
end
# you can use `run :local` to run tasks on local machine before of after the deploy scripts
# run(:local){ say 'done' }
end
# For help in making your deploy script, see the Mina documentation:
#
# - https://github.com/mina-deploy/mina/tree/master/docs
set :execution_mode, :exec if RbConfig::CONFIG['host_os'] =~ /mswin|mingw/
When I run now mina setup he print that:
$ mina setup
User#xx.xxx.xxx.xxx's password:
SSH Auth key working fine and git working fine he just puts User instead of user before the ip, what is not working because the user just exists with small letter. But my working machine is named User.