Removing auto-credentials, because they fundamentally cannot work behind a password-gated artifact server.

src/main/scala/gs/Gs.scala

@@ -1,5 +1,7 @@
 package gs;
 
+import sbt._
+
 object Gs {
   /**
     * Standard compiler options used by GS projects.
@@ -81,4 +83,36 @@ object Gs {
     val MavenUser: String = "GS_MAVEN_USER"
     val MavenToken: String = "GS_MAVEN_TOKEN"
   }
+
+  /**
+    * Prefers to load credentials from file, if a file is available. Otherwise
+    * mandates that the following environment variables exist:
+    *
+    *   - `GS_MAVEN_USER`
+    *   - `GS_MAVEN_TOKEN`
+    *
+    * @return The selected credentials for GS Maven.
+    */
+  def selectCredentials(): Credentials =
+    if ((Path.userHome / ".sbt" / ".credentials").exists())
+      Credentials(Path.userHome / ".sbt" / ".credentials")
+    else
+      Credentials.apply(
+        realm =Gs.MavenRealm,
+        host = Gs.MavenHost,
+        userName = sys.env
+          .get(Gs.Environment.MavenUser)
+          .getOrElse(
+            throw new RuntimeException(
+              s"You must either provide ~/.sbt/.credentials or specify the ${Gs.Environment.MavenUser} environment variable."
+            )
+          ),
+        passwd = sys.env
+          .get(Gs.Environment.MavenToken)
+          .getOrElse(
+            throw new RuntimeException(
+              s"You must either provide ~/.sbt/.credentials or specify the ${Gs.Environment.MavenToken} environment variable."
+            )
+          )
+        )
 }

src/main/scala/gs/GsPlugin.scala

@@ -10,40 +10,7 @@ object GsPlugin extends AutoPlugin {
 
   import autoImport._
 
-  /**
-    * Prefers to load credentials from file, if a file is available. Otherwise
-    * mandates that the following environment variables exist:
-    *
-    *   - `GS_MAVEN_USER`
-    *   - `GS_MAVEN_TOKEN`
-    *
-    * @return The selected credentials for GS Maven.
-    */
-  def selectCredentials(): Credentials =
-    if ((Path.userHome / ".sbt" / ".credentials").exists())
-      Credentials(Path.userHome / ".sbt" / ".credentials")
-    else
-      Credentials.apply(
-        realm =Gs.MavenRealm,
-        host = Gs.MavenHost,
-        userName = sys.env
-          .get(Gs.Environment.MavenUser)
-          .getOrElse(
-            throw new RuntimeException(
-              s"You must either provide ~/.sbt/.credentials or specify the ${Gs.Environment.MavenUser} environment variable."
-            )
-          ),
-        passwd = sys.env
-          .get(Gs.Environment.MavenToken)
-          .getOrElse(
-            throw new RuntimeException(
-              s"You must either provide ~/.sbt/.credentials or specify the ${Gs.Environment.MavenToken} environment variable."
-            )
-          )
-        )
-
   override def projectSettings: Seq[Setting[_]] = Seq(
-    credentials += selectCredentials(),
     publishMavenStyle := true,
     Test / Keys.publishArtifact := false,
     pomIncludeRepository := Function.const(false),