Authenticate using a Bearer token to support OAuth tokens

Author: armsnyder

docs/index.md

@@ -57,8 +57,8 @@ resource "gitlab_project" "sample_group_project" {
 
 The following arguments are supported in the `provider` block:
 
-* `token` - (Optional) This is the GitLab personal access token. It must be provided, but
-  it can also be sourced from the `GITLAB_TOKEN` environment variable.
+* `token` - (Required) The OAuth2 token or project/personal access token used to connect to GitLab.
+  It must be provided, but it can also be sourced from the `GITLAB_TOKEN` environment variable.
 
 * `base_url` - (Optional) This is the target GitLab base API endpoint. Providing a value is a
   requirement when working with GitLab CE or GitLab Enterprise e.g. `https://my.gitlab.server/api/v4/`.

gitlab/config.go

@@ -67,7 +67,9 @@ func (c *Config) Client() (*gitlab.Client, error) {
 		opts = append(opts, gitlab.WithBaseURL(c.BaseURL))
 	}
 
-	client, err := gitlab.NewClient(c.Token, opts...)
+	// The OAuth method is also compatible with project/personal access tokens because they are all usable as Bearer tokens.
+	// https://docs.gitlab.com/ee/api
+	client, err := gitlab.NewOAuthClient(c.Token, opts...)
 	if err != nil {
 		return nil, err
 	}

gitlab/provider.go

@@ -112,7 +112,7 @@ var descriptions map[string]string
 
 func init() {
 	descriptions = map[string]string{
-		"token": "The OAuth token used to connect to GitLab.",
+		"token": "The OAuth2 token or project/personal access token used to connect to GitLab.",
 
 		"base_url": "The GitLab Base API URL",