Updated provider (no need to put endpoint in provider infos in TF files, it...

Updated provider (no need to put endpoint in provider infos in TF files, it now reads a config.json file at the root of the TF projet)

one/provider.go

 package one
 
 import (
+	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -18,7 +19,7 @@ func Provider() *schema.Provider {
 		Schema: map[string]*schema.Schema{
 			"endpoint": {
 				Type:        schema.TypeString,
-				Required:    true,
+				Optional:    true,
 				Description: "Endpoint",
 			},
 
@@ -71,9 +72,27 @@ func Provider() *schema.Provider {
 
 func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 	// Setup configuration
+	var endpoint = ""
 	var username = ""
 	var passwd = ""
 
+	var configJSON map[string]interface{}
+
+	bytes, err := ioutil.ReadFile("./config.json")
+
+	if err == nil {
+		if err = json.Unmarshal(bytes, &configJSON); err != nil {
+			return nil, fmt.Errorf("error while reading the config.json file")
+		}
+	}
+
+	endp, okEndpoint := d.GetOk("endpoint")
+	if okEndpoint {
+		endpoint = endp.(string)
+	} else {
+		endpoint = configJSON["endpoint"].(string)
+	}
+
 	usern, okUsername := d.GetOk("username")
 	if okUsername {
 		username = usern.(string)
@@ -103,7 +122,7 @@ func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 		vmTimeout = v.(int)
 	}
 
-	config := CreateConfig(d.Get("endpoint").(string), username, passwd, oneflowHost, vmTimeout)
+	config := CreateConfig(endpoint, username, passwd, oneflowHost, vmTimeout)
 	// Return new client
 	return config.Client()
 }