Plex Beta security warning on Plex Server - IP address -

Hello all using for 'ages' Plex Beta and it was running awesome - however last weekend - I discovered that in some rooms the music did not start on the sonos speakers - our rooms do have different default playlists - and the music is stored on a mac mini running Plex Server. Today I found that the account which connected Plex Beta Sonos with the Plex Server was disconnected and not able to connect - So by reconnecting i received NEXT error:
!!! Security Alert !!! Another device is attempting to sign in using your Plex account. !!!
!!! You should only continue if you know this device and intend to grant it access. !!!
52.50.219.39 (Dublin, Leinster, Ireland) Can somebody tell me what is going on Here?

Thank you for your input or thoughts 🙂

The IP address changes but the Town/County and Country do not change - this IP address information Whois -
Mac-mini-i5:~ info$ whois 52.50.219.39
% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org
% This query returned 1 object

refer: whois.arin.net

inetnum: 52.0.0.0 - 52.255.255.255
organisation: Administered by ARIN
status: LEGACY

whois: whois.arin.net

changed: 1991-12
source: IANA


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/public/whoisinaccuracy/index.xhtml
#


#
# Query terms are ambiguous. The query is assumed to be:
# "n + 52.50.219.39"
#
# Use "?" to get help.
#

#
# The following results may also be obtained via:
# https://whois.arin.net/rest/nets;q=52.50.219.39?showDetails=true&showARIN=false&showNonArinTopLevelNet=false&ext=netref2
#


# start

NetRange: 52.48.0.0 - 52.51.255.255
CIDR: 52.48.0.0/14
NetName: AMAZON-DUB
NetHandle: NET-52-48-0-0-1
Parent: AT-88-Z (NET-52-32-0-0-1)
NetType: Reallocated
OriginAS: AS16509
Organization: Amazon Data Services Ireland Limited (ADSIL-1)
RegDate: 2015-10-21
Updated: 2015-10-21
Ref: https://whois.arin.net/rest/net/NET-52-48-0-0-1


OrgName: Amazon Data Services Ireland Limited
OrgId: ADSIL-1
Address: Unit 4033, Citywest Avenue Citywest Business Park
City: Dublin
StateProv: D24
PostalCode:
Country: IE
RegDate: 2014-07-18
Updated: 2014-07-18
Ref: https://whois.arin.net/rest/org/ADSIL-1


OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
OrgTechPhone: +1-206-266-4064
OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://whois.arin.net/rest/poc/ANO24-ARIN

OrgNOCHandle: AANO1-ARIN
OrgNOCName: Amazon AWS Network Operations
OrgNOCPhone: +1-206-266-4064
OrgNOCEmail: amzn-noc-contact@amazon.com
OrgNOCRef: https://whois.arin.net/rest/poc/AANO1-ARIN

OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-266-4064
OrgAbuseEmail: abuse@amazonaws.com
OrgAbuseRef: https://whois.arin.net/rest/poc/AEA8-ARIN

# end


# start

NetRange: 52.32.0.0 - 52.63.255.255
CIDR: 52.32.0.0/11
NetName: AT-88-Z
NetHandle: NET-52-32-0-0-1
Parent: NET52 (NET-52-0-0-0-0)
NetType: Direct Allocation
OriginAS:
Organization: Amazon Technologies Inc. (AT-88-Z)
RegDate: 2015-09-02
Updated: 2015-09-02
Ref: https://whois.arin.net/rest/net/NET-52-32-0-0-1



OrgName: Amazon Technologies Inc.
OrgId: AT-88-Z
Address: 410 Terry Ave N.
City: Seattle
StateProv: WA
PostalCode: 98109
Country: US
RegDate: 2011-12-08
Updated: 2017-01-28
Comment: All abuse reports MUST include:
Comment: * src IP
Comment: * dest IP (your IP)
Comment: * dest port
Comment: * Accurate date/timestamp and timezone of activity
Comment: * Intensity/frequency (short log extracts)
Comment: * Your contact details (phone and email) Without these we will be unable to identify the correct owner of the IP address at that point in time.
Ref: https://whois.arin.net/rest/org/AT-88-Z


OrgNOCHandle: AANO1-ARIN
OrgNOCName: Amazon AWS Network Operations
OrgNOCPhone: +1-206-266-4064
OrgNOCEmail: amzn-noc-contact@amazon.com
OrgNOCRef: https://whois.arin.net/rest/poc/AANO1-ARIN

OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
OrgTechPhone: +1-206-266-4064
OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://whois.arin.net/rest/poc/ANO24-ARIN

OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-266-4064
OrgAbuseEmail: abuse@amazonaws.com
OrgAbuseRef: https://whois.arin.net/rest/poc/AEA8-ARIN

# end



#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/public/whoisinaccuracy/index.xhtml
#

Mac-mini-i5:~ info$