Runtime Error: Invalid Memory Address or Nil Pointer Dereference during Fresh Install

[kavibritto]

Describe the bug
After performing a fresh installation of Komiser, the application fails to start, and a runtime error occurs. The error message states: "runtime error: invalid memory address or nil pointer dereference." This error is preventing the application from functioning as expected.

To Reproduce
Steps to reproduce the behavior:

1. Perform a fresh installation of Komiser on the target system.
2. Attempt to start the Komiser application. ./komiser_Linux_x86_64 start --config config.toml --verbose
3. Observe the runtime error: "invalid memory address or nil pointer dereference."

/komiser-latest # ./komiser_Linux_x86_64 start --config config.toml --verbose
INIT!!!
INFO[2023-10-13T07:27:08Z] Debug logging is enabled                     
INFO[2023-10-13T07:27:08Z] Data will be stored in SQLite                
INFO[2023-10-13T07:27:08Z] migrated to group #1 (20230413100000, 20230602100000, 20230619100000, 20231014100000) 
INFO[2023-10-13T07:27:08Z] Komiser version: 3.1.1, commit: 5fb674f0211958fd511b42cbec94dbaae1a41acd, buildt: 1696429830 
INFO[2023-10-13T07:27:08Z] Fetching resources workflow has started      
ERRO[2023-10-13T07:27:15Z] error fetching AWS resources                  err="runtime error: invalid memory address or nil pointer dereference"

Desktop (please complete the following information):

• OS: Ubuntu 22.04 LTS
• Version : Komiser 3.1.1

[github-actions]

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[Azanul]

[Azanul]

[azan@azarch ~]$ ./komiser_Linux_x86_64 start --config config.toml --verbose
INIT!!!
INFO[2023-10-16T15:36:37+05:30] Debug logging is enabled                     
INFO[2023-10-16T15:36:37+05:30] Data will be stored in SQLite                
WARN[2023-10-16T15:36:37+05:30] AWS account cannot be inserted to database   
INFO[2023-10-16T15:36:37+05:30] there are no new migrations to run (database is up to date) 
INFO[2023-10-16T15:36:37+05:30] Komiser version: 3.1.1, commit: 5fb674f0211958fd511b42cbec94dbaae1a41acd, buildt: 1696429830 
INFO[2023-10-16T15:36:37+05:30] Fetching resources workflow has started      
WARN[2023-10-16T15:36:42+05:30] Failed to check for new version: Get "https://api.github.com/repos/tailwarden/komiser/releases/latest": context deadline exceeded (Client.Timeout exceeded while awaiting headers) 
INFO[2023-10-16T15:36:45+05:30] Fetched resources                             account=Test provider=AWS region=us-east-1 resources=0 service=EC2
INFO[2023-10-16T15:36:53+05:30] Fetched resources                             account=Test provider=AWS region=us-east-1 resources=0 service="Elastic IP"
INFO[2023-10-16T15:37:13+05:30] Fetched resources                             account=Test provider=AWS region=us-east-1 resources=1 service=Lambda
INFO[2023-10-16T15:37:21+05:30] Fetched resources                             account=Test provider=AWS region=us-east-1 resources=2 service=ACL
INFO[2023-10-16T15:37:22+05:30] Fetched resources                             account=Test provider=AWS region=us-east-1 resources=8 service=Subnet

[azan@azarch ~]$ cat /etc/os-release
NAME="Arch Linux"
PRETTY_NAME="Arch Linux"
ID=arch
BUILD_ID=rolling
ANSI_COLOR="38;2;23;147;209"
HOME_URL="https://archlinux.org/"
DOCUMENTATION_URL="https://wiki.archlinux.org/"
SUPPORT_URL="https://bbs.archlinux.org/"
BUG_REPORT_URL="https://bugs.archlinux.org/"
PRIVACY_POLICY_URL="https://terms.archlinux.org/docs/privacy-policy/"
LOGO=archlinux-logo

[kavibritto]

@Azanul
need nil check for instance key pair name. because we are using ec2 instance with Ec2 session managers. in this case we don't have an ec2 key pair for the instance.

please refer to the screenshot.