title: SSHKit::Runner::ExecuteError: Exception while executing on host Net::SSH::AuthenticationFailed: Authentication failed
body: <p>Try to deploy rails app using Capistrano 3, when I run this command , get this error</p>
  
  <pre><code>vagrant@vagrant-ubuntu-utopic-32:/vagrant$ cap production deploy
  INFO [e4213f70] Running /usr/bin/env mkdir -p /tmp/career/ on 192.168.51.54
  DEBUG [e4213f70] Command: /usr/bin/env mkdir -p /tmp/career/
  Text will be echoed in the clear. Please install the HighLine or Termios librari
  es to suppress echoed text.
  @192.168.51.54's password:secert
  @192.168.51.54's password:secert
  @192.168.51.54's password:secert
  (Backtrace restricted to imported tasks)
  cap aborted!
  SSHKit::Runner::ExecuteError: Exception while executing on host 192.168.51.54: A
  uthentication failed for user @192.168.51.54
  
  Net::SSH::AuthenticationFailed: Authentication failed for user @192.168.51.54
  
  Tasks: TOP =&gt; git:check =&gt; git:wrapper
  (See full trace by running task with --trace)
  The deploy has failed with an error: Exception while executing on host 192.168.5
  1.54: Authentication failed for user @192.168.51.54
  </code></pre>
  
  <p>i saw some posts [<a href="https://stackoverflow.com/questions/21560297/capistrano-sshauthenticationfailed-not-prompting-for-password">1</a>,<a href="https://stackoverflow.com/questions/26090145/cap-aborted-sshkitrunnerexecuteerror-exception-while-executing-on-host">2</a>]in stack overflow. but I am still getting error.</p>
  
  <p>here is my  Capfile:</p>
  
  <pre><code>require 'capistrano/setup'
  set :stage, :production
  require 'capistrano/deploy'
  Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r }
  </code></pre>
  
  <p>deploy.rb file:</p>
  
  <pre><code>lock '3.4.0'
  set :application, "career"
  set :repo_url, "https://github.com/mezbahalam/offender_profile"
  
  set :user, 'vagrant'
  # set :scm_passphrase, "password"
  set :deploy_to, "/home/vagrant/apps/career"
  set :use_sudo, false
  set :scm, :git
  server "192.168.51.54",  roles: [:app, :web, :db], :primary =&gt; true 
  </code></pre>
  
  <p>what am I donig wrong? </p>