diff --git a/src/Tgstation.Server.Host/Components/Instance.cs b/src/Tgstation.Server.Host/Components/Instance.cs
index 38932c5277..0973cd9322 100644
--- a/src/Tgstation.Server.Host/Components/Instance.cs
+++ b/src/Tgstation.Server.Host/Components/Instance.cs
@@ -392,8 +392,8 @@ namespace Tgstation.Server.Host.Components
 
 					var result = await repo.MergeOrigin(
 						NextProgressReporter("Merge Origin"),
-						repositorySettings.CommitterName,
-						repositorySettings.CommitterEmail,
+						repositorySettings.CommitterName!,
+						repositorySettings.CommitterEmail!,
 						true,
 						cancellationToken);
 
@@ -456,8 +456,8 @@ namespace Tgstation.Server.Host.Components
 							NextProgressReporter("Synchronize"),
 							repositorySettings.AccessUser,
 							repositorySettings.AccessToken,
-							repositorySettings.CommitterName,
-							repositorySettings.CommitterEmail,
+							repositorySettings.CommitterName!,
+							repositorySettings.CommitterEmail!,
 							shouldSyncTracked,
 							true,
 							cancellationToken);
diff --git a/src/Tgstation.Server.Host/Components/Repository/IRepository.cs b/src/Tgstation.Server.Host/Components/Repository/IRepository.cs
index ed858ab492..795e264609 100644
--- a/src/Tgstation.Server.Host/Components/Repository/IRepository.cs
+++ b/src/Tgstation.Server.Host/Components/Repository/IRepository.cs
@@ -5,8 +5,6 @@ using System.Threading.Tasks;
 using Tgstation.Server.Api.Models;
 using Tgstation.Server.Host.Jobs;
 
-#nullable disable
-
 namespace Tgstation.Server.Host.Components.Repository
 {
 	/// <summary>
@@ -46,18 +44,18 @@ namespace Tgstation.Server.Host.Components.Repository
 		/// Checks out a given <paramref name="committish"/>.
 		/// </summary>
 		/// <param name="committish">The sha or reference to checkout.</param>
-		/// <param name="username">The username used for fetching from submodule repositories.</param>
-		/// <param name="password">The password used for fetching from submodule repositories.</param>
+		/// <param name="username">The optional username used for fetching from submodule repositories.</param>
+		/// <param name="password">The optional password used for fetching from submodule repositories.</param>
 		/// <param name="updateSubmodules">If a submodule update should be attempted after the merge.</param>
 		/// <param name="progressReporter">The optional <see cref="JobProgressReporter"/> to report progress of the operation.</param>
 		/// <param name="cancellationToken">The <see cref="CancellationToken"/> for the operation.</param>
 		/// <returns>A <see cref="ValueTask"/> representing the running operation.</returns>
 		ValueTask CheckoutObject(
 			string committish,
-			string username,
-			string password,
+			string? username,
+			string? password,
 			bool updateSubmodules,
-			JobProgressReporter progressReporter,
+			JobProgressReporter? progressReporter,
 			CancellationToken cancellationToken);
 
 		/// <summary>
@@ -66,8 +64,8 @@ namespace Tgstation.Server.Host.Components.Repository
 		/// <param name="testMergeParameters">The <see cref="TestMergeParameters"/> of the pull request.</param>
 		/// <param name="committerName">The name of the merge committer.</param>
 		/// <param name="committerEmail">The e-mail of the merge committer.</param>
-		/// <param name="username">The username used to fetch from the origin and submodule repositories.</param>
-		/// <param name="password">The password used to fetch from the origin and submodule repositories.</param>
+		/// <param name="username">The optional username used to fetch from the origin and submodule repositories.</param>
+		/// <param name="password">The optional password used to fetch from the origin and submodule repositories.</param>
 		/// <param name="updateSubmodules">If a submodule update should be attempted after the merge.</param>
 		/// <param name="progressReporter">The <see cref="JobProgressReporter"/> to report progress of the operation.</param>
 		/// <param name="cancellationToken">The <see cref="CancellationToken"/> for the operation.</param>
@@ -76,8 +74,8 @@ namespace Tgstation.Server.Host.Components.Repository
 			TestMergeParameters testMergeParameters,
 			string committerName,
 			string committerEmail,
-			string username,
-			string password,
+			string? username,
+			string? password,
 			bool updateSubmodules,
 			JobProgressReporter progressReporter,
 			CancellationToken cancellationToken);
@@ -86,15 +84,15 @@ namespace Tgstation.Server.Host.Components.Repository
 		/// Fetch commits from the origin repository.
 		/// </summary>
 		/// <param name="progressReporter">The optional <see cref="JobProgressReporter"/> to report progress of the operation.</param>
-		/// <param name="username">The username to fetch from the origin repository.</param>
-		/// <param name="password">The password to fetch from the origin repository.</param>
+		/// <param name="username">The optional username to fetch from the origin repository.</param>
+		/// <param name="password">The optional password to fetch from the origin repository.</param>
 		/// <param name="deploymentPipeline">If any events created should be marked as part of the deployment pipeline.</param>
 		/// <param name="cancellationToken">The <see cref="CancellationToken"/> for the operation.</param>
 		/// <returns>A <see cref="ValueTask"/> representing the running operation.</returns>
 		ValueTask FetchOrigin(
-			JobProgressReporter progressReporter,
-			string username,
-			string password,
+			JobProgressReporter? progressReporter,
+			string? username,
+			string? password,
 			bool deploymentPipeline,
 			CancellationToken cancellationToken);
 
@@ -102,16 +100,16 @@ namespace Tgstation.Server.Host.Components.Repository
 		/// Requires the current HEAD to be a tracked reference. Hard resets the reference to what it tracks on the origin repository.
 		/// </summary>
 		/// <param name="progressReporter">The <see cref="JobProgressReporter"/> to report progress of the operation.</param>
-		/// <param name="username">The username used for fetching from submodule repositories.</param>
-		/// <param name="password">The password used for fetching from submodule repositories.</param>
+		/// <param name="username">The optional username used for fetching from submodule repositories.</param>
+		/// <param name="password">The optional password used for fetching from submodule repositories.</param>
 		/// <param name="updateSubmodules">If a submodule update should be attempted after the merge.</param>
 		/// <param name="deploymentPipeline">If any events created should be marked as part of the deployment pipeline.</param>
 		/// <param name="cancellationToken">The <see cref="CancellationToken"/> for the operation.</param>
 		/// <returns>A <see cref="ValueTask{TResult}"/> resulting in the SHA of the new HEAD.</returns>
 		ValueTask ResetToOrigin(
 			JobProgressReporter progressReporter,
-			string username,
-			string password,
+			string? username,
+			string? password,
 			bool updateSubmodules,
 			bool deploymentPipeline,
 			CancellationToken cancellationToken);
@@ -155,8 +153,8 @@ namespace Tgstation.Server.Host.Components.Repository
 		/// <returns>A <see cref="ValueTask{TResult}"/> resulting in <see langword="true"/> if commits were pushed to the tracked origin reference, <see langword="false"/> otherwise.</returns>
 		ValueTask<bool> Sychronize(
 			JobProgressReporter progressReporter,
-			string username,
-			string password,
+			string? username,
+			string? password,
 			string committerName,
 			string committerEmail,
 			bool synchronizeTrackedBranch,