diff --git a/src/client.test.ts b/src/client.test.ts
index 5f01e94..1320d73 100644
--- a/src/client.test.ts
+++ b/src/client.test.ts
@@ -11,6 +11,7 @@ import {
   ModelDocumentFolder,
   ModelInvoice,
   ModelPaymentMethod,
+  ModelSevUser,
   ModelTag,
   ModelUnity,
 } from "./interfaces.js";
@@ -49,10 +50,7 @@ test("Get next invoice number", async () => {
 });
 
 test("Create a new invoice", async () => {
-  const { objects: invoiceNumber } = await sevDeskClient.getNextInvoiceNumber({
-    invoiceType: "RE",
-    useNextNumber: true,
-  });
+  const invoiceNumber = `TEST-${new Date().toISOString()}`;
   const { objects: contacts } = await sevDeskClient.getContacts();
 
   const {
@@ -147,7 +145,6 @@ test("Create a new invoice", async () => {
     discountDelete: null,
   });
 
-  console.log(invoice);
   assertIsInvoice(invoice);
 });
 
@@ -211,6 +208,14 @@ test("Get tags", async () => {
   assert.is(tags.length > 0, true);
   tags.forEach(assertIsTag);
 });
+
+test("Get users", async () => {
+  const { objects: users } = await sevDeskClient.getSevUsers();
+
+  assert.is(users.length > 0, true);
+  users.forEach(assertIsSevUser);
+});
+
 const assertIsInvoice = (invoice: ModelInvoice) => {
   assert.is(invoice.objectName, "Invoice");
 };
@@ -243,4 +248,8 @@ const assertIsTag = (tag: ModelTag) => {
   assert.is(tag.objectName, "Tag");
 };
 
+const assertIsSevUser = (user: ModelSevUser) => {
+  assert.is(user.objectName, "SevUser");
+};
+
 test.run();
diff --git a/src/client.ts b/src/client.ts
index 17b636f..fc469fe 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -8,6 +8,7 @@ import {
   ModelDocumentFolder,
   ModelInvoice,
   ModelPaymentMethod,
+  ModelSevUser,
   ModelTag,
   ModelUnity,
 } from "./interfaces.js";
@@ -277,6 +278,21 @@ export class SevDeskClient {
     });
   }
 
+  // -------------------------------------------------------
+  // SevUser
+  // -------------------------------------------------------
+
+  /**
+   * Get an overview of all users
+   */
+  async getSevUsers(params: UrlParamsFor<"apiGetSevUsersUrl"> = {}) {
+    const url = this.urls.apiGetSevUsersUrl(params);
+
+    return this.request<{ objects: Array<Required<ModelSevUser>> }>(url, {
+      method: "GET",
+    });
+  }
+
   // // pending invoices from sevdesk includes also outstanding / due invoices
   // // we remove them with a filter but you could also include the if you only need everything pending
   // async getPendingInvoices(options = { includeOutstanding: false }) {
diff --git a/src/urls.ts b/src/urls.ts
index 91ffd4d..6e5adb0 100644
--- a/src/urls.ts
+++ b/src/urls.ts
@@ -142,4 +142,15 @@ export class SevDeskUrls {
       query,
     });
   }
+
+  // -------------------------------------------------------
+  // SevUser
+  // -------------------------------------------------------
+
+  apiGetSevUsersUrl({ ...query }: DefaultCollectionQuery & Query = {}) {
+    return this.apiUrl({
+      path: `SevUser`,
+      query,
+    });
+  }
 }