diff --git a/main.tf b/main.tf
index 784f35a..9bac68e 100644
--- a/main.tf
+++ b/main.tf
@@ -1,90 +1,103 @@
-resource "aws_vpc" "sgtm_vpc" {
-  cidr_block           = "10.123.0.0/16"
-  enable_dns_hostnames = true
-  enable_dns_support   = true
-
-  tags = {
-    name = "dev"
-  }
-}
-
-resource "aws_subnet" "sptm_public_subnet" {
-  vpc_id                  = aws_vpc.sgtm_vpc.id
-  cidr_block              = "10.123.1.0/24"
-  map_public_ip_on_launch = true
-  availability_zone       = "us-east-1a"
-
-  tags = {
-    name = "dev-public"
-  }
-}
-
-resource "aws_internet_gateway" "sgtm_internet_gateway" {
-  vpc_id = aws_vpc.sgtm_vpc.id
-
-  tags = {
-    name = "dev-igw"
-  }
-}
-
-resource "aws_route_table" "sgtm_public_rt" {
-  vpc_id = aws_vpc.sgtm_vpc.id
-
-  tags = {
-    name = "dev_public_rt"
-  }
-}
-
-resource "aws_route" "default_route" {
-  route_table_id         = aws_route_table.sgtm_public_rt.id
-  destination_cidr_block = "0.0.0.0/0"
-  gateway_id             = aws_internet_gateway.sgtm_internet_gateway.id
-}
-
-resource "aws_route_table_association" "sgtm_public_assoc" {
-  subnet_id      = aws_subnet.sptm_public_subnet.id
-  route_table_id = aws_route_table.sgtm_public_rt.id
-}
-
-resource "aws_security_group" "sgtm_sg" {
-  name        = "dev-sg"
-  description = "dev security group"
-  vpc_id      = aws_vpc.sgtm_vpc.id
-
-  ingress {
-    from_port   = 0
-    to_port     = 0
-    protocol    = "-1"
-    cidr_blocks = ["172.59.221.135/32"]
-  }
-
-  egress {
-    from_port   = 0
-    to_port     = 0
-    protocol    = "-1"
-    cidr_blocks = ["0.0.0.0/0"]
-  }
-}
-
-resource "aws_key_pair" "sgtm_auth" {
-    key_name = "sgtmkey"
-    public_key = file("~/.ssh/sgtmkey.pub")
-}
-
-resource "aws_instance" "dev_node" {
-    instance_type = "t2.micro"
-    ami = data.aws_ami.server_ami.id
-    key_name = aws_key_pair.sgtm_auth.id
-    vpc_security_group_ids = [aws_security_group.sgtm_sg.id]
-    subnet_id = aws_subnet.sptm_public_subnet.id
-    user_data = file ("userdata.tpl")
-
-    root_block_device {
-        volume_size = 10
-    }
-
-    tags = {
-        name = "dev-node"
-    }
-
+
+
+resource "aws_vpc" "sgtm_vpc" {
+  cidr_block           = "10.123.0.0/16"
+  enable_dns_hostnames = true
+  enable_dns_support   = true
+
+  tags = {
+    name = "dev"
+  }
+}
+
+resource "aws_subnet" "sptm_public_subnet" {
+  vpc_id                  = aws_vpc.sgtm_vpc.id
+  cidr_block              = "10.123.1.0/24"
+  map_public_ip_on_launch = true
+  availability_zone       = "us-east-1a"
+
+  tags = {
+    name = "dev-public"
+  }
+}
+
+resource "aws_internet_gateway" "sgtm_internet_gateway" {
+  vpc_id = aws_vpc.sgtm_vpc.id
+
+  tags = {
+    name = "dev-igw"
+  }
+}
+
+resource "aws_route_table" "sgtm_public_rt" {
+  vpc_id = aws_vpc.sgtm_vpc.id
+
+  tags = {
+    name = "dev_public_rt"
+  }
+}
+
+resource "aws_route" "default_route" {
+  route_table_id         = aws_route_table.sgtm_public_rt.id
+  destination_cidr_block = "0.0.0.0/0"
+  gateway_id             = aws_internet_gateway.sgtm_internet_gateway.id
+}
+
+resource "aws_route_table_association" "sgtm_public_assoc" {
+  subnet_id      = aws_subnet.sptm_public_subnet.id
+  route_table_id = aws_route_table.sgtm_public_rt.id
+}
+
+resource "aws_security_group" "sgtm_sg" {
+  name        = "dev-sg"
+  description = "dev security group"
+  vpc_id      = aws_vpc.sgtm_vpc.id
+
+  ingress {
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["172.59.221.135/32"]
+  }
+
+  egress {
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+}
+
+resource "tls_private_key" "key" {
+  algorithm   = var.tls_key_algorithm
+}
+
+resource "aws_key_pair" "sgtm_auth" {
+  key_name   = "${var.name_prefix}-key-${var.name_suffix}"
+  public_key = tls_private_key.key.public_key_openssh
+
+  provisioner "local-exec" {
+    command = <<EOF
+      echo "${tls_private_key.key.private_key_pem}" > key.pem
+      chmod 0600 key.pem
+EOF
+  }
+}
+
+resource "aws_instance" "dev_node" {
+    instance_type = "t2.micro"
+    ami = data.aws_ami.server_ami.id
+    key_name = aws_key_pair.sgtm_auth.id
+    vpc_security_group_ids = [aws_security_group.sgtm_sg.id]
+    subnet_id = aws_subnet.sptm_public_subnet.id
+    user_data = file ("userdata.tpl")
+
+    root_block_device {
+        volume_size = 10
+    }
+
+    tags = {
+        name = "dev-node"
+    }
+
 }
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