title: Why do I get - Failed to resolve com.squareup.retrofit2: retrofit:2.3.0
body: <p>Here is my code, I am follwing a tutorial on making a login for my app but when I got to this stage I get errors.</p>
  
  <pre><code>dependencies {
      implementation fileTree(include: ['*.jar'], dir: 'libs')
      implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
      implementation 'com.android.support.constraint:constraint-layout:1.1.2'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'com.android.support.test:runner:1.0.2'
      androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
      implementation 'com.sqaureup.retrofit2:retrofit:2.3.0'
      implementation 'com.sqaureup.retrofit2:converter-gson:2.3.0'
  }
  </code></pre>
  
  <p>Any ideas?</p>