Add ability to supply Mongo connection uri

mongodb/README.md

@@ -48,11 +48,25 @@ store := mongodb.New(mongodb.Config{
 	Collection: "fiber_storage",
 	Reset:      false,
 })
+
+// Initialize custom config using connection string
+store := mongodb.New(mongodb.Config{
+	Connection: "mongodb://user:password@127.0.0.1:27017",
+	Database:   "fiber",
+	Collection: "fiber_storage",
+	Reset:      false,
+})
+
 ```
 
 ### Config
 ```go
 type Config struct {
+	// Connection string to use for DB. Will override all other authentication values if used
+	//
+	// Optional. Default is ""
+	Connection string
+
 	// Whether the DB is hosted on MongoDB Atlas
 	//
 	// Optional. Default is false
@@ -98,6 +112,7 @@ type Config struct {
 ### Default Config
 ```go
 var ConfigDefault = Config{
+	Connection: "",
 	Atlas:      false,
 	Host:       "127.0.0.1",
 	Port:       27017,

mongodb/config.go

@@ -2,6 +2,11 @@ package mongodb
 
 // Config defines the config for storage.
 type Config struct {
+	// Connection string to use for DB. Will override all other authentication values if used
+	//
+	// Optional. Default is ""
+	Connection string
+
 	// Whether the DB is hosted on MongoDB Atlas
 	//
 	// Optional. Default is false
@@ -45,6 +50,7 @@ type Config struct {
 
 // ConfigDefault is the default config
 var ConfigDefault = Config{
+	Connection: "",
 	Atlas:      false,
 	Host:       "127.0.0.1",
 	Port:       27017,

mongodb/mongodb.go

@@ -33,7 +33,13 @@ func New(config ...Config) *Storage {
 	cfg := configDefault(config...)
 
 	// Create data source name
-	var dsn = "mongodb"
+	var dsn string
+
+	// Check if user supplied connection string
+	if cfg.Connection != "" {
+		dsn = cfg.Connection
+	} else {
+		dsn = "mongodb"
 		if cfg.Atlas {
 			dsn += "+srv://"
 		} else {
@@ -54,6 +60,7 @@ func New(config ...Config) *Storage {
 		} else {
 			dsn += fmt.Sprintf("%s:%d", url.QueryEscape(cfg.Host), cfg.Port)
 		}
+	}
 
 	// Set mongo options
 	opt := options.Client()