Update readme

README.md

@@ -35,7 +35,7 @@ To access the API you need a current Bearer Token. You will receive this token w
 
 ```go
 // Get bearer token
-data, err := tillhub.AuthKey("accudId", "apiKey")
+data, err := tillhub.AuthKey("accountId", "apiKey")
 if err != nil {
     fmt.Println(err)
 }
@@ -50,7 +50,7 @@ To find out the tax ids and get more information about the tax you can use the f
 
 ```go
 // Get tax information
-tax, err := Tax("accoundId", "token")
+tax, err := Tax("accountId", "token")
 if err != nil {
     fmt.Println(err)
 }
@@ -252,7 +252,7 @@ To remove a product you need the ID of the product and you can remove it with th
 
 ```go
 // Delete an product whith his dependencies
-delete, err := DeleteProduct("productId", "userId", "token")
+delete, err := tillhub.DeleteProduct("productId", "userId", "token")
 if err != nil {
     fmt.Println(err)
 }
@@ -267,11 +267,43 @@ If you want to read out all product groups, you can do it with this function. Bo
 
 ```go
 // Get all product groups
-groups, err := ProductGroups("accoundId", "token")
+groups, err := tillhub.ProductGroups("accountId", "token")
 if err != nil {
 fmt.Println(err)
 }
 
 // Print all product groups
 fmt.Println(groups)
+```
+
+### Create new product group
+
+To define a new product group the following function can be used. You can find the documentation [here](https://api.tillhub.com/api/docs#tag/product_groups/paths/~1api~1v0~1product_groups~1{clientAccountID}/post).
+
+```go
+// Create product body data
+body := tillhub.CreateProductGroupBody{
+    true,
+    "#87cef9",
+    "newGroup",
+    "00001",
+    "f85910a6-94c4-40bd-a0ac-386ef880c857",
+    "673ba8d1-f544-48be-b432-122633e92715",
+	tillhub.CreateProductGroupBodyImages{
+        "https://storage.googleapis.com/tillhub-api-images/dd5a5b03-69fd-4747-bd6c-2ecf22ec78c1/productGroups/1a743bf7-10af-4897-891e-13c9924441de_1x.png",
+        "https://storage.googleapis.com/tillhub-api-images/dd5a5b03-69fd-4747-bd6c-2ecf22ec78c1/productGroups/1a743bf7-10af-4897-891e-13c9924441de_1x.png",
+        "https://storage.googleapis.com/tillhub-api-images/dd5a5b03-69fd-4747-bd6c-2ecf22ec78c1/productGroups/1a743bf7-10af-4897-891e-13c9924441de_1x.png",
+        "https://storage.googleapis.com/tillhub-api-images/dd5a5b03-69fd-4747-bd6c-2ecf22ec78c1/productGroups/1a743bf7-10af-4897-891e-13c9924441de_1x.png",
+        "https://storage.googleapis.com/tillhub-api-images/dd5a5b03-69fd-4747-bd6c-2ecf22ec78c1/productGroups/1a743bf7-10af-4897-891e-13c9924441de_1x.png",
+    },
+}
+
+// Save new product group
+group, err := tillhub.CreateProductGroup(body, "accountId", "token")
+if err != nil {
+    fmt.Println(err)
+}
+
+// Print return
+fmt.Println(group)
 ```