diff --git a/dnsapi/dns_servercow.sh b/dnsapi/dns_servercow.sh
index e7049598..3ffc393e 100755
--- a/dnsapi/dns_servercow.sh
+++ b/dnsapi/dns_servercow.sh
@@ -19,88 +19,88 @@ SERVERCOW_API="https://api.servercow.de/dns/v1/domains"
 
 # Usage dns_servercow_add _acme-challenge.www.domain.com "abcdefghijklmnopqrstuvwxyz"
 dns_servercow_add() {
-	fulldomain=$1
-	txtvalue=$2
+  fulldomain=$1
+  txtvalue=$2
 
-	_info "Using servercow"
-	_debug fulldomain "$fulldomain"
-	_debug txtvalue "$txtvalue"
+  _info "Using servercow"
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$txtvalue"
 
-	SERVERCOW_API_Username="${SERVERCOW_API_Username:-$(_readaccountconf_mutable SERVERCOW_API_Username)}"
-	SERVERCOW_API_Password="${SERVERCOW_API_Password:-$(_readaccountconf_mutable SERVERCOW_API_Password)}"
-	if [ -z "$SERVERCOW_API_Username" ] || [ -z "$SERVERCOW_API_Password" ]; then
-		SERVERCOW_API_Username=""
-		SERVERCOW_API_Password=""
-		_err "You don't specify servercow api username and password yet."
-		_err "Please create your username and password and try again."
-		return 1
-	fi
+  SERVERCOW_API_Username="${SERVERCOW_API_Username:-$(_readaccountconf_mutable SERVERCOW_API_Username)}"
+  SERVERCOW_API_Password="${SERVERCOW_API_Password:-$(_readaccountconf_mutable SERVERCOW_API_Password)}"
+  if [ -z "$SERVERCOW_API_Username" ] || [ -z "$SERVERCOW_API_Password" ]; then
+    SERVERCOW_API_Username=""
+    SERVERCOW_API_Password=""
+    _err "You don't specify servercow api username and password yet."
+    _err "Please create your username and password and try again."
+    return 1
+  fi
 
-	# save the credentials to the account conf file
-	_saveaccountconf_mutable SERVERCOW_API_Username "$SERVERCOW_API_Username"
-	_saveaccountconf_mutable SERVERCOW_API_Password "$SERVERCOW_API_Password"
+  # save the credentials to the account conf file
+  _saveaccountconf_mutable SERVERCOW_API_Username "$SERVERCOW_API_Username"
+  _saveaccountconf_mutable SERVERCOW_API_Password "$SERVERCOW_API_Password"
 
-	_debug "First detect the root zone"
-	if ! _get_root "$fulldomain"; then
-		_err "invalid domain"
-		return 1
-	fi
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
 
-	_debug _sub_domain "$_sub_domain"
-	_debug _domain "$_domain"
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
 
-	if _servercow_api POST "$_domain" "{\"type\":\"TXT\",\"name\":\"$fulldomain\",\"content\":\"$txtvalue\",\"ttl\":20}"; then
-		if printf -- "%s" "$response" | grep "ok" > /dev/null; then
-			_info "Added, OK"
-			return 0
-		else
-			_err "add txt record error."
-			return 1
-		fi
-	fi
-	_err "add txt record error."
+  if _servercow_api POST "$_domain" "{\"type\":\"TXT\",\"name\":\"$fulldomain\",\"content\":\"$txtvalue\",\"ttl\":20}"; then
+    if printf -- "%s" "$response" | grep "ok" > /dev/null; then
+      _info "Added, OK"
+      return 0
+    else
+      _err "add txt record error."
+      return 1
+    fi
+  fi
+  _err "add txt record error."
 
-	return 1
+  return 1
 }
 
 # Usage fulldomain txtvalue
 # Remove the txt record after validation
 dns_servercow_rm() {
-	fulldomain=$1
-	txtvalue=$2
+  fulldomain=$1
+  txtvalue=$2
 
-	_info "Using servercow"
-	_debug fulldomain "$fulldomain"
-	_debug txtvalue "$fulldomain"
+  _info "Using servercow"
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$fulldomain"
 
-	SERVERCOW_API_Username="${SERVERCOW_API_Username:-$(_readaccountconf_mutable SERVERCOW_API_Username)}"
-	SERVERCOW_API_Password="${SERVERCOW_API_Password:-$(_readaccountconf_mutable SERVERCOW_API_Password)}"
-	if [ -z "$SERVERCOW_API_Username" ] || [ -z "$SERVERCOW_API_Password" ]; then
-                SERVERCOW_API_Username=""
-                SERVERCOW_API_Password=""
-                _err "You don't specify servercow api username and password yet."
-                _err "Please create your username and password and try again."
-                return 1
-        fi
+  SERVERCOW_API_Username="${SERVERCOW_API_Username:-$(_readaccountconf_mutable SERVERCOW_API_Username)}"
+  SERVERCOW_API_Password="${SERVERCOW_API_Password:-$(_readaccountconf_mutable SERVERCOW_API_Password)}"
+  if [ -z "$SERVERCOW_API_Username" ] || [ -z "$SERVERCOW_API_Password" ]; then
+    SERVERCOW_API_Username=""
+    SERVERCOW_API_Password=""
+    _err "You don't specify servercow api username and password yet."
+    _err "Please create your username and password and try again."
+    return 1
+  fi
 
-	_debug "First detect the root zone"
-	if ! _get_root "$fulldomain"; then
-		_err "invalid domain"
-		return 1
-	fi
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
 
-	_debug _sub_domain "$_sub_domain"
-	_debug _domain "$_domain"
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
 
-	if _servercow_api DELETE "$_domain"  "{\"type\":\"TXT\",\"name\":\"$fulldomain\"}"; then
-		if printf -- "%s" "$response" | grep "ok" > /dev/null; then
-			_info "Deleted, OK"
-			_contains "$response" '"message":"ok"'
-		else
-			_err "delete txt record error."
-			return 1
-		fi
-	fi
+  if _servercow_api DELETE "$_domain"  "{\"type\":\"TXT\",\"name\":\"$fulldomain\"}"; then
+    if printf -- "%s" "$response" | grep "ok" > /dev/null; then
+      _info "Deleted, OK"
+      _contains "$response" '"message":"ok"'
+    else
+      _err "delete txt record error."
+      return 1
+    fi
+  fi
 
 }
 
@@ -111,60 +111,60 @@ dns_servercow_rm() {
 #  _sub_domain=_acme-challenge.www
 #  _domain=domain.com
 _get_root() {
-	fulldomain=$1
-	i=2
-	p=1
+  fulldomain=$1
+  i=2
+  p=1
 
-	while true; do
-		_domain=$(printf "%s" "$fulldomain" | cut -d . -f $i-100)
+  while true; do
+    _domain=$(printf "%s" "$fulldomain" | cut -d . -f $i-100)
 
-		_debug _domain "$_domain"
-		if [ -z "$_domain" ]; then
-			# not valid
-			return 1
-		fi
+    _debug _domain "$_domain"
+    if [ -z "$_domain" ]; then
+      # not valid
+      return 1
+    fi
 
-		if ! _servercow_api GET "$_domain"; then
-			return 1
-		fi
+    if ! _servercow_api GET "$_domain"; then
+      return 1
+    fi
 
-		if ! _contains "$response" '"error":"no such domain in user context"' > /dev/null; then
-			_sub_domain=$(printf "%s" "$fulldomain" | cut -d . -f 1-$p)
-			if [ -z "$_sub_domain" ]; then
-				# not valid
-				return 1
-			fi
+    if ! _contains "$response" '"error":"no such domain in user context"' > /dev/null; then
+      _sub_domain=$(printf "%s" "$fulldomain" | cut -d . -f 1-$p)
+      if [ -z "$_sub_domain" ]; then
+        # not valid
+        return 1
+      fi
 
-			return 0
-		fi
+      return 0
+    fi
 
-		p=$i
-		i=$(_math "$i" + 1)
-	done;
+    p=$i
+    i=$(_math "$i" + 1)
+  done;
 
-	return 1
+  return 1
 }
 
 _servercow_api() {
-	method=$1
-	domain=$2
-	data="$3"
+  method=$1
+  domain=$2
+  data="$3"
 
-	export _H1="Content-Type: application/json"
-	export _H2="X-Auth-Username: $SERVERCOW_API_Username"
-	export _H3="X-Auth-Password: $SERVERCOW_API_Password"
+  export _H1="Content-Type: application/json"
+  export _H2="X-Auth-Username: $SERVERCOW_API_Username"
+  export _H3="X-Auth-Password: $SERVERCOW_API_Password"
 
-	if [ "$method" != "GET" ]; then
-		_debug data "$data"
-		response="$(_post "$data" "$SERVERCOW_API/$domain" "" "$method")"
-	else
-		response="$(_get "$SERVERCOW_API/$domain")"
-	fi
+  if [ "$method" != "GET" ]; then
+    _debug data "$data"
+    response="$(_post "$data" "$SERVERCOW_API/$domain" "" "$method")"
+  else
+    response="$(_get "$SERVERCOW_API/$domain")"
+  fi
 
-	if [ "$?" != "0" ]; then
-		_err "error $domain"
-		return 1
-	fi
-	_debug2 response "$response"
-	return 0
+  if [ "$?" != "0" ]; then
+    _err "error $domain"
+    return 1
+  fi
+  _debug2 response "$response"
+  return 0
 }