title: gcloud confusion around add-iam-policy-binding
body: <p>Following gcloud documentation</p>
  <hr />
  <h1>gcloud iam service-accounts</h1>
  <p>add an IAM policy binding to <strong>an IAM service account</strong></p>
  <p><a href="https://cloud.google.com/sdk/gcloud/reference/iam/service-accounts/add-iam-policy-binding" rel="nofollow noreferrer">https://cloud.google.com/sdk/gcloud/reference/iam/service-accounts/add-iam-policy-binding</a></p>
  <h3>Example section</h3>
  <p>To add an IAM policy binding for the role of 'roles/editor' to the service account 'test-proj1@example.domain.com', run:</p>
  <pre><code>gcloud iam service-accounts add-iam-policy-binding \
   test-proj1@example.domain.com \
   --member='serviceAccount:test-proj1@example.domain.com' \
   --role='roles/editor'
  </code></pre>
  <hr />
  <h1>gcloud projects add-iam-policy-binding</h1>
  <p>add IAM policy binding <strong>for a project</strong></p>
  <p><a href="https://cloud.google.com/sdk/gcloud/reference/projects/add-iam-policy-binding" rel="nofollow noreferrer">https://cloud.google.com/sdk/gcloud/reference/projects/add-iam-policy-binding</a></p>
  <h3>Example section</h3>
  <p>To add an IAM policy binding for the role of 'roles/editor' to the service account 'test-proj1@example.domain.com', run:</p>
  <pre><code>gcloud projects add-iam-policy-binding \
   &lt;PROJECT_ID&gt; \
   --member='serviceAccount:test-proj1@example.domain.com' \
   --role='roles/editor'
  </code></pre>
  <hr />
  <h3> gcloud organizations add-iam-policy-binding</h3>
  <p>add IAM policy binding <strong>for an organization</strong></p>
  <p><a href="https://cloud.google.com/sdk/gcloud/reference/organizations/add-iam-policy-binding" rel="nofollow noreferrer">https://cloud.google.com/sdk/gcloud/reference/organizations/add-iam-policy-binding</a></p>
  <h3>Example section</h3>
  <p>To add an IAM policy binding for the role of 'roles/editor' to the service account 'test-proj1@example.domain.com', run:</p>
  <pre><code>gcloud organizations add-iam-policy-binding \
   test-proj1@example.domain.com \
   --member='serviceAccount:test-proj1@example.domain.com' \
   --role='roles/editor'
  </code></pre>
  <hr />
  <p>Does anyone knows if those 3 commands are actually the same ?</p>
  <p>Thanks in advance for your help.</p>
  <p>Jonathan.</p>