docs: Add new metrics to README

Author: Cyb3r-Jak3

README.md

@@ -32,6 +32,8 @@ Required authentication scopes:
 
 To authenticate this way, only set `CF_API_TOKEN` (omit `CF_API_EMAIL` and `CF_API_KEY`)
 
+[Shortcut to create the API token](https://dash.cloudflare.com/profile/api-tokens?permissionGroupKeys=%5B%7B%22key%22%3A%22account_analytics%22%2C%22type%22%3A%22read%22%7D%2C%7B%22key%22%3A%22account_settings%22%2C%22type%22%3A%22read%22%7D%2C%7B%22key%22%3A%22analytics%22%2C%22type%22%3A%22read%22%7D%2C%7B%22key%22%3A%22firewall_services%22%2C%22type%22%3A%22read%22%7D%5D&name=Cloudflare+Exporter&accountId=*&zoneId=all)
+
 ### User email + API key
 To authenticate with user email + API key, use the `Global API Key` from the Cloudflare dashboard.
 Beware that this key authenticates with write access to every Cloudflare resource.
@@ -104,6 +106,9 @@ Note: `ZONE_<name>` configuration is not supported as flag.
 # HELP cloudflare_zone_pool_requests_total Requests per pool
 # HELP cloudflare_logpush_failed_jobs_account_count Number of failed logpush jobs on the account level
 # HELP cloudflare_logpush_failed_jobs_zone_count Number of failed logpush jobs on the zone level
+# HELP cloudflare_r2_operation_count Number of operations performed by R2
+# HELP cloudflare_r2_storage_bytes Storage used by R2
+# HELP cloudflare_r2_storage_total_bytes Total storage used by R2
 ```
 
 ## Helm chart repository

cloudflare.go

@@ -758,7 +758,6 @@ func fetchR2Account(accountID string) (*cloudflareResponseR2Account, error) {
 	now := time.Now().Add(-time.Duration(viper.GetInt("scrape_delay")) * time.Second).UTC()
 	s := 60 * time.Second
 	now = now.Truncate(s)
-	now1mAgo := now.Add(-60 * time.Second)
 
 	request := graphql.NewRequest(`query($accountID: String!, $limit: Int!, $date: String!) {
 		viewer {