Add environment variable support

Author: Philip Reichenberger

README.md

@@ -9,23 +9,8 @@ import (
 )
 
 func getClient() *paperspace.Client {
-    apiBackend := paperspace.NewAPIBackend()
-    if p.BaseURL != "" {
-        apiBackend.BaseURL = p.BaseURL
-    }
-    if os.Getenv("PAPERSPACE_BASEURL") != "" {
-        apiBackend.BaseURL = os.Getenv("PAPERSPACE_BASEURL")
-    }
-    apiBackend.Debug = p.Debug
-    if os.Getenv("PAPERSPACE_DEBUG") != "" {
-        apiBackend.Debug = true
-    }
-    apiBackend.DebugBody = p.DebugBody
-    if os.Getenv("PAPERSPACE_DEBUG_BODY") != "" {
-        apiBackend.DebugBody = true
-    }
-    client := paperspace.NewClientWithBackend(paperspace.Backend(apiBackend))
+    client := paperspace.NewClient()
     client.APIKey = p.APIKey
     return client
 }
-```
+```

api_backend.go

@@ -10,6 +10,7 @@ import (
 	"math"
 	"net/http"
 	"net/http/httputil"
+	"os"
 	"time"
 )
 
@@ -24,14 +25,31 @@ type APIBackend struct {
 }
 
 func NewAPIBackend() *APIBackend {
-	return &APIBackend{
+	apiBackend := APIBackend{
 		BaseURL: DefaultBaseURL,
-		Debug:   false,
 		HTTPClient: &http.Client{
 			Timeout: 15 * time.Second,
 		},
 		RetryCount: 0,
 	}
+
+	baseURL := os.Getenv("PAPERSPACE_BASEURL")
+	if baseURL != "" {
+		apiBackend.BaseURL = baseURL
+	}
+
+	debug := os.Getenv("PAPERSPACE_DEBUG")
+	if debug != "" {
+		apiBackend.Debug = true
+	}
+	
+	debugBody := os.Getenv("PAPERSPACE_DEBUG_BODY")
+	if debugBody != "" {
+		apiBackend.DebugBody = true
+	}
+
+
+	return &apiBackend
 }
 
 func (c *APIBackend) Request(method string, url string,

client.go

@@ -3,6 +3,7 @@ package paperspace
 import (
 	"context"
 	"net/http"
+	"os"
 )
 
 type RequestParams struct {
@@ -17,15 +18,23 @@ type Client struct {
 
 // client that makes requests to Gradient API
 func NewClient() *Client {
-	return &Client{
+	client := Client{
 		Backend: NewAPIBackend(),
 	}
+
+	apiKey := os.Getenv("PAPERSPACE_APIKEY")
+	if apiKey != "" {
+		client.APIKey = apiKey
+	}
+
+	return &client
 }
 
 func NewClientWithBackend(backend Backend) *Client {
-	return &Client{
-		Backend: backend,
-	}
+	client := NewClient()
+	client.Backend = backend
+
+	return client
 }
 
 func (c *Client) Request(method string, url string, params, result interface{}, requestParams RequestParams) (*http.Response, error) {